Упростите выраж (a^n-b^2m)(-a^n-b^2m)

Question

Упростите выраж (a^n-b^2m)(-a^n-b^2m)

Comments

какой знак между b и 2m?

Answer 1

(a^n -b^2m)(-a^n -b^2m) =
-a^2n +b^4m