I can multiply this easily-but the problem says to simplify it. I have the answer and NO idea how to get there. Can someone help to simplify:
(3x^2-2x^2-7)(8x^2-8x+7)
Please show steps-I'm lost! Thanks!
Are you sure you typed it right? Is it $\displaystyle (3x^2-2x-7)(8x^2-8x+7)$ or $\displaystyle (3x^3-2x^2-7)(8x^2-8x+7)\;\;?$
Is this $\displaystyle (3x^2-2x^2-7)(8x^2-8x+7)$ the right question in your book? If it is then
$\displaystyle = (3x^2-2x^2-7)(8x^2-8x+7)$
$\displaystyle =(x^2-7)(8x^2-8x+7)$
$\displaystyle =8x^4-8x^3+7x^2-56x^2+56x-49$
$\displaystyle =8x^4-8x^3-49x^2+56x-49$ is the simplified answer.
answer in your book is wrong then.