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DrZoo · Answer 1 · 2017-01-11T14:13:27+0000

Perhaps the question is a^3 + b^3=?, otherwise a3 + b3 doesnt make sens
a^3 + b^3= (a+b)(a^2-ab+b^2)

for example a=2 b=1, 2^3+1^3=8+1=9, and (2+1)(2^2-2x1+1^2)=3x(3)=9

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