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December 21, 2014

December 21, 2014

Posted by **Carmin** on Thursday, June 4, 2009 at 8:20pm.

(3x-5)^2-(2x+1)(x-4)

- Algebra -
**Reiny**, Thursday, June 4, 2009 at 8:27pm(3x-5)^2-(2x+1)(x-4)

use FOIL to expand each one

= 9x^2 - 30x + 25 - (2x^2 - 8x + x - 4)

now simplify

- Algebra -
**Breanna**, Thursday, June 4, 2009 at 8:33pmYes but doesn't -8x and x combine to become -7x? so then it should look like this?

-2x^2 -7x -4?

- Algebra -
**Reiny**, Thursday, June 4, 2009 at 8:35pmof course ...

that is what I meant by simplify.

I was expecting you to finish the question.

can you tell me what the next few lines would be ?

- Algebra -
**Breanna**, Thursday, June 4, 2009 at 8:37pm9x2-30x+25

-2x2 -7x -4

--------------

7x2 -23+29

Is this correct?

- Algebra -
**Carmin**, Thursday, June 4, 2009 at 8:38pmThanks Breanna! Looks correct to me!

- Algebra -
**corinne**, Monday, February 11, 2013 at 8:13amPerform the indicated operations and simplify (2x - 6) (x + 1) - (x - 7)^2

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