Question

X(во 2 степени) +xy-x-ax-ay+a

Answer 1

$x^2+xy-x-ax-ay+a=x(x+y-1)-a(x+y-1)=(x-a)(x+ \\ y-1)$

Answer 2

(x²+xy-x)-(ax+ay-a)=x(x+y-1)-a(x+y-1)=(x+y-1)(x-a)