запишите в виде многочленов произведения (a+2)(b-3)
(c-d)(x-y)
(4-b)(5+c)
(k-6)(7-d)
(x-7)(x+8)
(9-y)(y+5)

(A+2)(b-3)=ab-3a+2b-6(C-d)(x-y)=cx-cy-dx+dy (4-b)(5+c)=20+4c-5b-bc=4c-5b-bc+20(K-5)(7-d)=7k-dk-35+5d=-dk+7k+5d-35(X-7)(x+8)=x2+8x-7x-56=x2+x-56(9-y)(y+5)=9y+45-y2-5y=-y2+2y+45