phan tich da thuc thanh nhan tu x^2 -y^2 -2*x+2*y

Question

thucquyen · Answer

`x^2 -y^2 -2x+2y`   `=(x^2-y^2)-(2x-2y)`   `=(x-y)(x+y)-2(x-y)`   `=(x-y)[(x+y)-2]`   `=(x-y)(x+y-2)`

khanhngan · Answer

$x^2-y^2-2x+2y$   $=(x-y)(x+y)-2(x-y)$   $=(x-y)(x+y-2)$

phan tich da thuc thanh nhan tu x^2 -y^2 -2x+2y