1)ax²-bx²-bx+ax-a+b=
2)ax²+bx-bx-ax+a+b=

1)ac²-ad+c³-cd-bc²+bd=

3)x²-8x+15=
4)x²-7x+12=
Даю 25 балов

1) ах^2+ах-а-bx^2-bx-b = a(x^2+x-1)-b(x^2-x-1) = (a-b)(x^2+x-1)2) ax^2+bx^2-bx-ax+a+b = a(x^2-x+1)+b(x^2-x+1) = (a+b)(x^2-x+1)3)x^2-8x+15 = x(x-8)+154)x^2-7x+12 = x(x-7)+12