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Question
a3 + b3 = (a + b)3 = __________
Options
3a(a + b)
3ab(a – b)
– 3ab(a + b)
3ab(a + b)
MCQ
Fill in the Blanks
Solution
3ab(a + b)
Explanation;
Hint:
(a + b)3 = a3 + b3 + 3a2b + 3ab2
(a + b)3 – 3a2b – 3ab3 = a3 + b3
(a + b)3 – 3ab(a + b) = a3 + b3
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