CPM Homework Help : PC Problem 1-121

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1-121.

Factor each of the following expressions.

$4x^{2} − 9y^{2}$
Hint (a):
This is the difference of two perfect squares.
Answer (a):
$\left(2x - 3y\right)\left(2x + 3y\right)$

$8x^{3} − 2x^{7}$
Hint (b):
Factor out the common factors first.
Partial Answer (b):
$2x^3(4-x^4)$
Now you have a difference of two perfect squares. Factor again.

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