Math Help ASAP
Math Help ASAP
#0Math Help ASAP
Posted: 6/12/06 at 7:25pm
Please, all you people who are just roaming the boards, use your math skills to help me out!
If you have 2 roots of a quadratic equation as (1+3i) and (1-3i) how do you write the quadratic equation in the normal ax^2 +bx+c form?
please and thank you!
Also, I know there is some FOILing involved, could you be ever so kind as to type out those steps? My brian isnt' working and I can't remember this for my final tomorrow!
And the other thing about the Phantom Lady was, Bert, she realized, in the city that never sleeps...
What did she realize, Kitten?
That all the songs she'd listened to, all the love songs, that they were only songs.
What's wrong with that?
Nothing, if you don't believe in them. But she did, you see. She believed in enchanted evenings, and she believed that a small cloud passed overhead and cried down on a flower bed, and she even believed there was breakfast to be had...
Where?
On Pluto. The mysterious, icy wastes of Pluto.
#1re: Math Help ASAP
Posted: 6/12/06 at 7:42pm...Please? I'll love you forever and I'll share my 100 thanks to the answering of this question from my final with you ;D!
And the other thing about the Phantom Lady was, Bert, she realized, in the city that never sleeps...
What did she realize, Kitten?
That all the songs she'd listened to, all the love songs, that they were only songs.
What's wrong with that?
Nothing, if you don't believe in them. But she did, you see. She believed in enchanted evenings, and she believed that a small cloud passed overhead and cried down on a flower bed, and she even believed there was breakfast to be had...
Where?
On Pluto. The mysterious, icy wastes of Pluto.
#2re: Math Help ASAP
Posted: 6/12/06 at 7:48pmI'm sorry, I wish I could help. Even if I could help you, you wouldn't want my help seeing as how I failed my math final this year.
<--Sometimes it's easier to get out of a jam than into one
Broadway Legend Joined: 12/31/69
#3re: Math Help ASAP
Posted: 6/12/06 at 7:54pmDO you have the answer in the back of the book? If what I did is correct, I can explain how to get the answer.
colleen_lee
Broadway Legend Joined: 8/16/05
#4re: Math Help ASAP
Posted: 6/12/06 at 7:57pm
(1 + 3i)(1 - 3i)
F: 1*1=1
O: 1*-3i=-3i
I: 1*3i=3i
L: 3i*-3i=-9i^2
= -9i^2 + 1 (the 3i's cancel eachother out as one is pos. and one is neg.)
I don't know. I could be totally wrong. It's been probably 10 years since I've done one of those.
"You just can't win. Ever. Look at the bright side, at least you are not stuck in First Wives Club: The Musical. That would really suck. "
--Sueleen Gay
Updated On: 6/12/06 at 07:57 PM
Broadway Legend Joined: 12/31/69
#5re: Math Help ASAP
Posted: 6/12/06 at 8:01pm
I just pm-ed you the same thing.
You can simplify further b/c i^2= -1
so it is -9(-1) + 1 =10
Right?
#6re: Math Help ASAP
Posted: 6/12/06 at 8:03pm
well the answer is x^2 -2x + 10 = O somehow..
I think the second step is supposed to be
(x-(1+3i)) (x-(1-3i)) but I have no clue how to FOIL that thing.
Thanks for your replies though!! Anyone know where to go from there?
And the other thing about the Phantom Lady was, Bert, she realized, in the city that never sleeps...
What did she realize, Kitten?
That all the songs she'd listened to, all the love songs, that they were only songs.
What's wrong with that?
Nothing, if you don't believe in them. But she did, you see. She believed in enchanted evenings, and she believed that a small cloud passed overhead and cried down on a flower bed, and she even believed there was breakfast to be had...
Where?
On Pluto. The mysterious, icy wastes of Pluto.
#7re: Math Help ASAP
Posted: 6/12/06 at 8:04pmdouble post
And the other thing about the Phantom Lady was, Bert, she realized, in the city that never sleeps...
What did she realize, Kitten?
That all the songs she'd listened to, all the love songs, that they were only songs.
What's wrong with that?
Nothing, if you don't believe in them. But she did, you see. She believed in enchanted evenings, and she believed that a small cloud passed overhead and cried down on a flower bed, and she even believed there was breakfast to be had...
Where?
On Pluto. The mysterious, icy wastes of Pluto.
Updated On: 6/12/06 at 08:04 PM
Broadway Legend Joined: 12/31/69
#8re: Math Help ASAP
Posted: 6/12/06 at 8:06pmOh- I understand what the question is now.. let me try again. I didn't read that it was the two roots of the quad eq'n. I'm tired... will reply in a few.
#9re: Math Help ASAP
Posted: 6/12/06 at 8:06pm
Don't worry about it :)
I've been staring at this question all day. ANY help is appreciated :)
And the other thing about the Phantom Lady was, Bert, she realized, in the city that never sleeps...
What did she realize, Kitten?
That all the songs she'd listened to, all the love songs, that they were only songs.
What's wrong with that?
Nothing, if you don't believe in them. But she did, you see. She believed in enchanted evenings, and she believed that a small cloud passed overhead and cried down on a flower bed, and she even believed there was breakfast to be had...
Where?
On Pluto. The mysterious, icy wastes of Pluto.
Broadway Legend Joined: 12/31/69
#10re: Math Help ASAP
Posted: 6/12/06 at 8:12pm
First, distribute the (-):
(x-1-3i)(x-1+3i)
then foil:
x^2-x+3xi-x+1-3i-3ix+3i-9i^2
cancel out 3xi-3xi, -3i+3i
that leaves you with:
x^2-2x-9i^2+1
x^2-2x-9(-1)+1
x^2-2x+10
DramaDork925
Broadway Legend Joined: 9/4/05
#11re: Math Help ASAP
Posted: 6/12/06 at 8:12pmOops
Am I cut out to spend my time this way?
Updated On: 6/12/06 at 08:12 PM
DramaDork925
Broadway Legend Joined: 9/4/05
#12re: Math Help ASAP
Posted: 6/12/06 at 8:12pmShameful triple post...
Am I cut out to spend my time this way?
Updated On: 6/12/06 at 08:12 PM
DramaDork925
Broadway Legend Joined: 9/4/05
#13re: Math Help ASAP
Posted: 6/12/06 at 8:12pm
(1+3i)(1-3i)
1*1=1
1*-3i= -3i
3i*1= 3i
3i*-3i= -9i^2= 9 because i^2= -1
I think at least...
Am I cut out to spend my time this way?
#14re: Math Help ASAP
Posted: 6/12/06 at 8:12pm
THANK YOU!!! 
!
And the other thing about the Phantom Lady was, Bert, she realized, in the city that never sleeps...
What did she realize, Kitten?
That all the songs she'd listened to, all the love songs, that they were only songs.
What's wrong with that?
Nothing, if you don't believe in them. But she did, you see. She believed in enchanted evenings, and she believed that a small cloud passed overhead and cried down on a flower bed, and she even believed there was breakfast to be had...
Where?
On Pluto. The mysterious, icy wastes of Pluto.
DramaDork925
Broadway Legend Joined: 9/4/05
#15re: Math Help ASAP
Posted: 6/12/06 at 8:13pmWow... I've never double posted like that before...
Am I cut out to spend my time this way?
colleen_lee
Broadway Legend Joined: 8/16/05
#16re: Math Help ASAP
Posted: 6/12/06 at 8:14pmOops. I misread the question. Sorry!
"You just can't win. Ever. Look at the bright side, at least you are not stuck in First Wives Club: The Musical. That would really suck. "
--Sueleen Gay
Broadway Legend Joined: 12/31/69
#17re: Math Help ASAP
Posted: 6/12/06 at 8:16pmGood luck tomorrow! Remember, when you see a problem like that, don't get overwhelmed. Just take it one step at a time and you will be fine!
#18re: Math Help ASAP
Posted: 6/12/06 at 8:21pm
(1+3i)(1-3i)
Oh geez those are nasty...precalculus from last term that I vaguely remember.
(x-(1+3i)) (x-(1-3i))
So basically FOIL:
F: (x)(x) = x^2
O: (x)(-1+3i) = -x+3xi
I: (x)(-1-3i) = -x-3xi
L: (-1-3i)(-1+3i) = ?
***remember to distribute the negative in parts O & I
You basically have to foil the L part of the original FOIL, so it's a foil inside a FOIL.
(-1-3i)(-1+3i)
F: (-1)(-1) = 1
O: (-1)(3i) = -3i
I: (-3i)(-1) = 3i
L: (-3i)(3i) = -9i^2 = (-9)(-1) = 9
So you get: 1-3i+3i+9 which equals 10
So going back to the first part of the FOIL you know know the product of (-1-3i)(-1+3i), which is 10.
F: (x)(x) = x^2
O: (x)(-1+3i) = -x+3xi
I: (x)(-1-3i) = -x-3xi
L: (-1-3i)(-1+3i) = 10
So then you have: x^2-x+3xi-x-3xi+10, combine like terms, the 3xi's cancle, and you have x^2-2x+10!
[edit] b/c some of the formating became 
Updated On: 6/12/06 at 08:21 PM
#19re: Math Help ASAP
Posted: 6/12/06 at 8:29pm
THank you everyone :)
Geez, I'll have to split my grade amongst many-a-smart-people :)hehe
Thanks again :)
And the other thing about the Phantom Lady was, Bert, she realized, in the city that never sleeps...
What did she realize, Kitten?
That all the songs she'd listened to, all the love songs, that they were only songs.
What's wrong with that?
Nothing, if you don't believe in them. But she did, you see. She believed in enchanted evenings, and she believed that a small cloud passed overhead and cried down on a flower bed, and she even believed there was breakfast to be had...
Where?
On Pluto. The mysterious, icy wastes of Pluto.
#20re: Math Help ASAP
Posted: 6/12/06 at 8:36pmOh god math! Bad flashback!
"All I ask of you is one thing: please don't be cynical. I hate cynicism -- it's my least favorite quality and it doesn't lead anywhere. Nobody in life gets exactly what they thought they were going to get. But if you work really hard and you're kind, amazing things will happen."
Conan O'Brien
#21re: Math Help ASAP
Posted: 6/12/06 at 8:59pmI couldn't understand a thing of that!!! I just had my math final today, and let me tell you: Bea isn't the smartest person in the world!!!
And.....SCENE!
SweetQintheLights
Broadway Legend Joined: 6/12/05
#22re: Math Help ASAP
Posted: 6/12/06 at 9:33pm
*blinks*
*Stares*
*leaves*
"How bout a little black dress?"~hannahshule
"I have a penis, not a vagina." ~munkustrap178
#23re: Math Help ASAP
Posted: 6/12/06 at 9:35pm***Offers cookies to the fellow math-a-phobes***
"All I ask of you is one thing: please don't be cynical. I hate cynicism -- it's my least favorite quality and it doesn't lead anywhere. Nobody in life gets exactly what they thought they were going to get. But if you work really hard and you're kind, amazing things will happen."
Conan O'Brien
#24re: Math Help ASAP
Posted: 6/12/06 at 9:39pmLet's take the cookies and go huddle in another room with a good novel. All these numbers are making me nervous.
And no one grew into anything new, we just became the worst of what we were."
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