Question

(x -5)^30 - (x-5)^28

Answer 1

\(\left(x-5\right)^{30}-\left(x-5\right)^{28}\)

\(=\left(x-5\right)^{28}\left[\left(x-5\right)^2-1\right]\)

\(=\left(x-5\right)^{28}\left(x-5-1\right)\left(x-5+1\right)\)

\(=\left(x-6\right)\left(x-4\right)\left(x-5\right)^{28}\)

Chúc bạn học tốt!!

Answer 2

\(\left(x-5\right)^{30}-\left(x-5\right)^{28}\)

\(=\left(x-5\right)^{28}\left[\left(x-5\right)^2-1\right]\)

\(=\left(x-5\right)^{28}\left(x-5-1\right)\left(x-5+1\right)\)

\(=\left(x-6\right)\left(x-4\right)\left(x-5\right)^{28}\)

Chúc bạn học tốt!