Question

a(a+b)^3-3a^2b(a+b)​

Answer 1

Answer:

a( a^3+b^3+3ab(a+b)) -3a^3b-3a^2b^2

a^4+ab^3+3a^2b(a+b) -3a^3b-3a^2b^2

a^4+ab^3+3a^3b+3a^2b^2-3a^3b-3a^2b^2

a^4 +ab^3

a(a^3+b^3)