The Homework Help Thread

[The Weird One]

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

[GreecePwns]

This should be stickied

[hecter]

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.

[unriggable]

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

[The Weird One]

This should be stickied

ya

[hecter]

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

[0ojakeo0]

how do u square a number on the comp?

[unriggable]

how do u square a number on the comp?

number times number.

[GreecePwns]

how do u square a number on the comp?

Type 5^2=25

Is that what you are asking?

[Neutrino]

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.

[0ojakeo0]

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

[Neutrino]

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

[hecter]

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

[GreecePwns]

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

Do you mean 8t^2?

[0ojakeo0]

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

Do you mean 8t^2?

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

[Titanic]

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=?

[0ojakeo0]

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

[GreecePwns]

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.

[Titanic]

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?

[misterman10]

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

[GreecePwns]

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.

[misterman10]

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

[GreecePwns]

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.

[fireedud]

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

[hecter]

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

*waves*