Question

(X+2)^3+(x-2)^3 full solution

Answer 1

let x+2= a

x-2= b

so,

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

=8x^3 - 3(x^2-4)(2x)

=8x^3 - 6x^3 +24x

=2x^3 +24x