Question

\(x^2-2xy+y^2-z^2+2zt-t^2\)

Answer 1

\(\Rightarrow\left(x-y\right)^2-\left(x^2-2zt+t^2\right)\Leftrightarrow\left(x-y\right)^2-\left(z-t\right)^2\Leftrightarrow\left(x-y-z+t\right)\left(x-y+z-t\right)\)

Đây nha T I C K cho mình nha

Answer 2

\(x^2-2xy+y^2-z^2+2zt-t^2\)

\(=\left(x^2-2xy+y^2\right)-\left(z^2-2zt+t^2\right)\)

\(=\left(x-y\right)^2-\left(z-t\right)^2\)

\(=\left(x-y-z+t\right)\left(x-y+z-t\right)\)

Ủng hộ nha