Question

(b-a)⁴=
.....................

Answer 1

(b-a)^4

(b-a)^2+2

(b-a)^2×(b-a)^2

(b^2-2ab+a^2)×(b^2-2ab+a^2)

b^4-2ab^3+a^2 b^2-2ab^3+4a^2 b^2-2a^3 b+a^2 b^2-2a^3 b+a^4

b^4-4ab^3+6a^2 b^2-4a^3 b+a^4