If a + b = 3 and ab = 2, then a3 + b3 = ?
A
6
B
7
C
8
D
9
Correct Answer: 9
Given That, a+b = 3 , ab=2We know,(a3+b3)=(a+b)3-3ab(a+b) = 33-3×2×3 = 27-18 = 9 Ans 9.