Question

If a + b = 2 ,then a^3 + b^3 - 8 = ?

Answer 1

Answer:

Ans: - 6ab

Explanation:

a+b=2

(a+b) *3=(2)*3

a*3+b*3+3ab(a+b)=8

a*3+b*3-8= -3ab(a+b)

a*3+b*3-8= - 3(2)(ab)

a*3+b*3-8= -6(ab)

Hence ans: - 6ab