Posted by Carmin on Thursday, June 4, 2009 at 8:20pm.
(3x-5)^2-(2x+1)(x-4)
use FOIL to expand each one
= 9x^2 - 30x + 25 - (2x^2 - 8x + x - 4)
now simplify
Yes but doesn't -8x and x combine to become -7x? so then it should look like this?
-2x^2 -7x -4?
of 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 ?
9x2-30x+25
-2x2 -7x -4
--------------
7x2 -23+29
Is this correct?
Thanks Breanna! Looks correct to me!
Perform the indicated operations and simplify (2x - 6) (x + 1) - (x - 7)^2
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