Conquer Club

I couldn't find the old one, so, I decided to restart it (it was useful for a while)

This should be stickied

I'm given the roots x=(2-i) and x=(2+i), and I need to turn it into the quadratic equation ax^2+bx+c=0 form. i stands for imaginary number.

i = square root of -1. Plug it in, plug it in.

GreecePwns wrote:This should be stickied

ya

unriggable wrote:i = square root of -1. Plug it in, plug it in.

I know that. I even said that. It still doesn't help me though... I've tried some substitution with that, but it didn't work

how do u square a number on the comp?

0ojakeo0 wrote:how do u square a number on the comp?

number times number.

0ojakeo0 wrote:how do u square a number on the comp?

Type 5^2=25

Is that what you are asking?

hecter wrote:I'm given the roots x=(2-i) and x=(2+i), and I need to turn it into the quadratic equation ax^2+bx+c=0 form. i stands for imaginary number.

Define "roots"

I think I've done this question before, but the phrasing was better.

8^2 + 2t- 5t -8=?

Don't bother. I remember now. Just gimme a sec to work out how the Quadratic Formula works backwards...

hecter wrote:

unriggable wrote:i = square root of -1. Plug it in, plug it in.

I know that. I even said that. It still doesn't help me though... I've tried some substitution with that, but it didn't work

Yes! I figured it out!

x^2+5x+6=0 can be factored to:
(x+3)(x+2)=0 which means:
x=-3 and x=-2

That means that if I work my way backwards...
x=(2+i) and x=(2-i) so I get:
(x-2-i)(x-2+i) which is multiplied out to:
x^2-2x+xi-2x+4-2i-xi+2i-i^2
simplify that to:
x^2-4x+5 which means
a=1 b=-4 and c=5

0ojakeo0 wrote:8^2 + 2t- 5t -8=?

Do you mean 8t^2?

GreecePwns wrote:

0ojakeo0 wrote:8^2 + 2t- 5t -8=?

Do you mean 8t^2?

ya my bad its 8t^2 +3t-8 right?

0ojakeo0 wrote:8^2 + 2t- 5t -8=?

Um...wtf? You've got a variable, but only 1 side of the equations. Thats impossible because it just goes to 58-3t=?

Titanic wrote:

0ojakeo0 wrote:8^2 + 2t- 5t -8=?

Um...wtf? You've got a variable, but only 1 side of the equations. Thats impossible because it just goes to 58-3t=?

someone pointed that out and i fixed it in the next post

0ojakeo0 wrote:

GreecePwns wrote:

0ojakeo0 wrote:8^2 + 2t- 5t -8=?

Do you mean 8t^2?

ya my bad its 8t^2 +3t-8 right?

No (2t - 5t = -3t), but it could be continued if you're asked to.

0ojakeo0 wrote:

Titanic wrote:

0ojakeo0 wrote:8^2 + 2t- 5t -8=?

Um...wtf? You've got a variable, but only 1 side of the equations. Thats impossible because it just goes to 58-3t=?

someone pointed that out and i fixed it in the next post

Yer, soz, took too long to post. Btw, your new one, what is originally equal to? 0?

it was also titled the homework thread
whatev though, I guess my thread wasn't good enough

can anybody help me with my term paper and write it for me? thanks in advance

misterman10 wrote:it was also titled the homework thread
whatev though, I guess my thread wasn't good enough

can anybody help me with my term paper and write it for me? thanks in advance

depends on the topic and if I have interest in it.

GreecePwns wrote:

misterman10 wrote:it was also titled the homework thread
whatev though, I guess my thread wasn't good enough

can anybody help me with my term paper and write it for me? thanks in advance

depends on the topic and if I have interest in it.

I was kidding though

misterman10 wrote:

GreecePwns wrote:

misterman10 wrote:it was also titled the homework thread
whatev though, I guess my thread wasn't good enough

can anybody help me with my term paper and write it for me? thanks in advance

depends on the topic and if I have interest in it.

I was kidding though

I was too.

I need help finding information about imaginary numbers (sources other than wiki would be appreciated).

fireedud wrote:I need help finding information about imaginary numbers (sources other than wiki would be appreciated).

*waves*