Question

в^2 - 2b /b-2 / 3-2b /b^2 - 4b+4

Answer 1

(a+b)^4=a^4+b^4+4a^3b+6a^2b^2+4ab^3
(a-b)^4=a^4+b^4+6a^2b^2-4ab^3