Here's a new one

[latresa31s]

slove the wquation by completing the square;completely simplify the answer: expressingany complex mumbers using i notation:

4x^2 + 12x - 12 = -2


4x^2 + 12x- 12 = -2
(+12 = +12)
4x^2 + 12x -10 = 0
I am not sure if I have done this one right can you guys put me in the right direction

 

[soroban]

Hello, latresa31s!

Solve the equation by completing the square.
Completely simplify the answer, expressing any complex mumbers using i notation:

. . . 4x² + 12x - 12 = -2

We have: .4x² + 12x .= .10

Divide by 4: .x² + 3x .= .5/2

Complete the square: .x² + 3x + 9/4 .= .5/2 + 9/4

Simplify: .(x + 3/2)² .= .19/4
. . . . . . . . . . . . . . . . . . . . . . ____ . . . . __
Square root: .x + 3/2 .= .±√19/4 .= .±√19/2
. . . . . . . . . . . . . . . . . . __ . . . . . . . . . . . __
Finally: . x . = . -3/2 ± √19/2 . = . (-3 ± √19)/2

 

[latresa31s]

Thank you Soroban You have help me a great deal. I am sure with out all of you at free math help. com I would fail my algebra class. I may pass now thanks again.

 

[Denis]

I'm surprised that you jumped to "completing the square" so quickly, latresa.

Anyway, if you go here, I think you'll understand more what Soroban did:
http://www.purplemath.com/modules/sqrquad.htm

Plus the equations they use as example are quite similar to yours.

 

[latresa31s]

I was not to quick I thanked her because I was working on it and got some of the problem right I just was glad to see that I was on the right track.

 

[latresa31s]

Denis, thanks for the website I have printed the material off to use. Please post more websites that will help. Thanks again.

 

[stapel]

Thank you Soroban....

I thanked her because....

FYI: Soroban is a "he". :wink:

Eliz.

 

[latresa31s]

Sooooo Sorrrrrrry :?

 

[stapel]

Sooooo Sorrrrrrry

Don't be. Like I said, the post was just "FYI".

Soroban strikes me as being very nice, and I would rather doubt he was "offended" or anything.

Eliz.