Question

(B-A)^2=?

(B-A)^3=?

Answer 1

(B-A)^2=B^2-2AB+A^2

(B-A)^3=B^3-3B^2A+3BA^2-A^3

Answer 2

\(\left(B-A\right)^2=\left(B-A\right)\cdot\left(B-A\right)=B^2-2AB+A^2\)

\(\left(B-A\right)^3=\left(B-A\right)\cdot\left(B-A\right)\cdot\left(B-A\right)=B^3-3A^2B+3B^2A-A^3\)