Question

Срочно!!!!!!!!!!!!!!!!!!!

Answer 1

Ответ:

1) (a-2)(b+5)=ab+5a-2b-10

2) (m+n)(p-k)=mp-mk+np-nk

3) (x-8)(x+4)=$x^{2}$+4x-8x-32=$x^{2}$-4x-32

4) (x-10)(x-9)=$x^{2}$-9x-10x+90=$x^{2}$-19x+90