Question

х^2-bх-ax-ab=
a^2+ab-2a-2b=

Answer 1

1) = (x^2-ax)-(bx+ab) = x(x-a)-b(x-a)= (x-a)(x-b)
2) = (a^2-2a)+(ab-2b) = a(a-2)+b(a-2)=(a-2)(a+b)