Question

(x - 2y - z)2.By using standard formula expand the following​

Answer 1

Step-by-step explanation:

(x+2y-z)²

x²+2(x)(-2y)+4y²+ 2(-2y)(-z)+z²+2(-z)(x)

x²-4xy +4y²+4yz+z²-2xz

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