Q. If $a + b = 3$ and $ab = 2$ , then find $a^{3} + b^{3}$ .

370 149 Polynomials, LCM and HCF of Polynomials Report Error

A

6

B

4

C

9

D

12

Solution:

Use $a^{3} + b^{3} = (a + b)^{3} - 3 ab (a + b)$ to find $a^{3} + b^{3}$ .