Question

Гооооо даюю 45 балов!!!!!

Answer 1

Ответ:

(а+d)(c+3)=ac+3a+ds+3d

(a-2b)(3x-4y)=3ax-4ay-6bx+8by

(a+b-2)(c+5)=ac+5a+bc+5b-2c-10

Answer 2

1) =ac+3a+bc+3b

2)= 3ax-4ay-6bx+8bx

3) =ac+5a+bc+5b-2c+10