Question

Find (x-2y-z)(x^2+4y^2+z^2+2xy-2yz+zx)

Answer 1

Answer:

By simplify it and contracting we get

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

Step-by-step explanation:

So x^2+2xy+xz-2xy -4y^2 -2yz -zx -2yz-z^2

= x^2- 4y^2 - 2yz - z^2

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