(а-2)(а+2)-2a(5-а) =

Question

(а-2)(а+2)-2a(5-а) =

Answer 1

A^2 - 4 - 10a + 2a^2 = 3a^2 - 10a - 4

Answer 2

(а-2)(а+2)-2a(5-а)= =a²-4-10a+2a²= =3a²-10a-4