Question

Please answer very urgent

Answer 1

Answer:

(a+b)^3 - (a-b)^3 …. Expand cubic function.

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

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

=6 * a^2* b + 2 * b ^3

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