Question

Solve this expansion
(i) (x - 2y – z)2​

Answer 1

Answer:

hope my answer helps you..

Answer 2

Answer:

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

step by step explanation:

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

The formula for is equal to  x^2+y^2+z^2-2xy-2yz-2zx

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

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