Verified answer

x²-y-x+y = x²-x+y-y = x(x-1)-(y-1) = (x-1)(x-(y-1))

4a²-64 = 4(a²-16)

Ответ:

1) x²-y-x+y = x*(x-1)

2) 4a²-64 = 4(a²-16) = 4(a-4)(a+4)