# How do i solve this easy equation?

• Jan 27th 2013, 05:20 AM
Assassinbeast
How do i solve this easy equation?
Hello :-)

I have no idea why this is going wrong:

0 = -3^2 - 4*2*x
3^2 = -4*2*x
9 = -4*2*x
9 / (-4*2) = x

x = -1.125

it should be 1.125 :S not negative

• Jan 27th 2013, 05:59 AM
a tutor
Re: How do i solve this easy equation?
You got it right.
• Jan 27th 2013, 09:42 AM
Assassinbeast
Re: How do i solve this easy equation?
no i didn't... try to put -1.125 at the x position, and its wrong
• Jan 27th 2013, 10:46 AM
mathmansam
Re: How do i solve this easy equation?
I think the issue is that it is (-3)^2. This makes 9. So instead of adding 3^2 to both sides in your first algebraic step, you should subtract 9. This will alleviate the negative issue.

Hope this helps!
• Jan 27th 2013, 12:33 PM
a tutor
Re: How do i solve this easy equation?
Maybe, but it says -3^2 and that is -9.

Do we have to guess what people are asking?
• Jan 27th 2013, 02:16 PM
Assassinbeast
Re: How do i solve this easy equation?
Quote:

Originally Posted by mathmansam
I think the issue is that it is (-3)^2. This makes 9. So instead of adding 3^2 to both sides in your first algebraic step, you should subtract 9. This will alleviate the negative issue.

Hope this helps!

thank you, i got it