Solve this expansion
(i) (x - 2y – z)2
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hope my answer helps you..
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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
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