Question

Rút g

ọn (x - y + z)^2 + (z - y)^2 + (x - y + z)(2y -2z)

Answer 1

 (x - y + z)^2 + (z - y)^2 + (x - y + z)(2y -2z)

\(<=>(x-y+z)^2+2(x-y+z)(y-z)+(z-y)^2\)

\(<=> (x-y+z+z-y)^2<=> ( x-2y-2z)^2\)

Answer 2

\(\left(x+y+z\right)^2+\left(z-y\right)^2+\left(x-y+z\right)\left(2y-2z\right)\)

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

\(=\left(x+2y\right)^2\)