Question

plse ans anyone plse

Answer 1

(a+b)^3 = a^3+b^3+3ab(a+b)
(a+b)^3 = (-1)^3

Answer 2

Step-by-step explanation:

(a+b)^3=a^3+b^3+ab^3

(a+b)^3=a^3+b^3=>(-1)^3=-1