Question

Resuelve con procedimiento
(2x+y-z)(2x-y+z)

Answer 1

(2x+y-z)(2x-y+z)
4x^2-2xy+2xz+2xy-y^2+yz+2xz-yz+z^2
R\\ 4x^2+4xz-y^2+z^2

Answer 2

Si x =4 y = - 2 y 2 = 5, determine el valor de:

1. 2x+y+z