Question

If a+b =6 and a-b= 2 find the value of a^3 + b^3

Answer 1

Explanation:

a + b = 6 ---- (1)
a - b = 2 ---- (2)

2a = 8
a = 4 ; b = 2

a^3 + b^3

= 4^3 + 2^3
= 64 + 8

= 72