Answer: (x+4)(x^2+16)
Step-by-step explanation:
x^3+4x^2+16x+64
x^3+4x^2+16x+64
=(x+4)(x^2+16)
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The principal square root of 49 is just
7 because 7 times 7 is 49.
It can not be -7 because
a principle square root cannot be negative.
![\sf\ Answer: A)\ 7](https://tex.z-dn.net/?f=%5Csf%5C%20Answer%3A%20A%29%5C%207)
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