Write the following in expanded form A)(X-2y-3z)^2 B) (-x+2y+z)^2
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Answer:
(x-2y-3z)^2
=(x)^2+(-2y)^2+(-3z)^2 +2[X×-2y + (-2y×-3z) + (-3z×X)]
x^2+4y^2+9z^2-4xy+6yz-3zx
this sum is done according to (a+b+c)^2
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