The map that has a width of 15 inches and a length of 21 inches is being enlarged by a scale factor of
1 inch=2.2 feet and printed at the subway station. What is the area of the enlarged map? Do not
round you final answer.

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try looking in the very back of the book : )

step-by-step explanation:

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hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb