Question

[Nguyen Mai Anh]

1. x²-4x-y​²+4

2. (x-y)²-(x+y)²

Phan tich da thuc thanh nhan tu

Answer 1

[Lưu ly]

1. = (x-2)^2 - y^2 = (x - 2 - y)(x-2+y)

2. = (x-y-x-y)(x-y+x+y) = 2(-y)2x = -4xy

Answer 2

[tranthanhbinh]

1=-(y^6-x^2-4x)