17-02-2016
Mathematics

Answered

What is the value of the expression when a = –4 and b = 5?

(a+2b)3 + 3a 2

A.

–348

B.

264

C.

–952

D.

168

Please Help me ASAP

Verified Answer :

17-02-2016

\((a+2b)^3 + 3a^2\\\\=(-4+2(5))^3 + 3(-4)^2\\\\=(-4+10)^3 +3(16)\\\\=6^3 + 3(16)\\\\=216 + 48\\\\=\boxed{\bf{264}}\)

Your answer is B) 264.

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