a +b=2, then a³ +6³ +6ab=?
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Answer:- 8
➡(a+b) = 2
cube Both side,
➡(a+b)^3 = (2)^3
➡ (a^3+b^3+3ab(a+b)) = 8
➡(a^3+b^3+3ab(2))= 8. (a+b=2)
➡(a^3+b^3+6ab) = 8 Ans
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