Question

If x + y = 3, then what is the value of x3 + y3 + 9xy?

A) 15 B) 81 C) 27 D) 9

Answer 1

27 option (C) is correct

Step-by-step explanation:

Given x+ y = 3

x^3 +y^3 + 9xy = x^3 + y^3 + 3(x)(y)(x+y)

= (x + y)^3 = (3)^3 = 27

Answer 2

option (C) is correct.

hope it helps...: )