Question

18x (x+1) (x-1)

Answer 1

18x(x+1)(x-1)

=(18x² +18x)(x-1)

=18x³-18x²+18x²-18x

=18x³-18x

Answer 2

18x(x+1)(x-1)=18x³  -18x

Answer 3

  18x(x+1) (x-1)

=(18x² +18x) (x-1)

=18x³-18x²+18x²-18x

= 18³- 18x

=  18x²

ai  k mk, mk k lai

nho nhaaaaaaaaa