Question
Please perform the indicated operations and simplify
(3x-5)^2-(2x+1)(x-4)
(3x-5)^2-(2x+1)(x-4)
Answers
Reiny
(3x-5)^2-(2x+1)(x-4)
use FOIL to expand each one
= 9x^2 - 30x + 25 - (2x^2 - 8x + x - 4)
now simplify
use FOIL to expand each one
= 9x^2 - 30x + 25 - (2x^2 - 8x + x - 4)
now simplify
Breanna
Yes but doesn't -8x and x combine to become -7x? so then it should look like this?
-2x^2 -7x -4?
-2x^2 -7x -4?
Reiny
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 ?
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 ?
Breanna
9x2-30x+25
-2x2 -7x -4
--------------
7x2 -23+29
Is this correct?
-2x2 -7x -4
--------------
7x2 -23+29
Is this correct?
Carmin
Thanks Breanna! Looks correct to me!
corinne
Perform the indicated operations and simplify (2x - 6) (x + 1) - (x - 7)^2