(X+2y+4z)pawer2 using the common identities
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Step-by-step explanation:
We know (a+b+c)²=a²+b²+c²+2ab+2bc+2ca
(x+2y+4z)²
=(x)²+(2y)²+(4z)²+2•x•2y+2•2y•4z+2•4z•x
=x²+4y²+16z²+4xy+16yz+8zx
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