Question

(X + Y + z) (x minus y + Z) + (X + Y - Z) (- - X + Y +z)-4zx​

Answer 1

Answer:

2y Square+6xy+4yz.

Step-by-step explanation:

(x+y+z)(x-y+z)--------------(1)

is equal to x square+xy+xz+yx+y square+yz+zx+zy+z square.

is equal to x Square+2xy+2xz+y Square+2yz+z Square.

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

is equal to -x square+xy-xz-xy+y Square+yz-xz+yz-z Square.

is equal to -x Square+y Square-2xz+2yz-z Square.

is equal to x Square+2xy+2xz+y Square+2yz+z Square-x Square+y Square+2yz-z Square-2xz.

is equal to 2y Square+6xy+4yz.

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