CPM Homework Help : PC3 Problem 1-13

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1-13.

Multiply or expand each expression below.

$(2x)^3$
Hint (a):
Expand and then multiply: $(2x)(2x)(2x)$
Answer (a):
$8x^3$

$(3x-2)^2$
Hint (b):
Use a generic rectangle.
Answer (b):
$9x^2−12x+4$

$(3x)^4$
Hint (c):
Use the procedure in part (a).

$(3x)^{-3}$
Hint (d):
$(3x)^{-3}=\large{\frac{1}{(3x)^3}}$
Answer (d):
$\large{\frac{1}{27\textit{x}^{3}}}$

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