Question

z=x^2+2xy-y^2-4x помогите решить

Answer 1

z=x^2+2xy-y^2-4x

z=(x-y)^2-4x

 

Answer 2

$z=x^{2}+2xy-y^{2}-4x$

$z=(x^{2}-y^{2})+(2xy-4x)$

$z=(x-y)(x+y)+2x*(y-2)$