Question

(x + 2y + 3z)=
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Answer 1

Answer:

(x-2y-3z)²

=[(x)-(2y+3z)]²

=x²-2x(2y+3z)+(2y+3z)²

=x²-4xy-6xz+4y²+2.2y.3z+9z²

=x²+4y²+9z²-4xy-6xz+12yz

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