Question

Expand (x+2y−z)2 using identities .
Proper explanation pls

Answer 1

Step-by-step explanation:

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

=x^2 +4y+z^2 +4xy-2yz-xz

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