计算(x+2y-3z)的平方+(x-2y+3z)(x+2y-3z)
2个回答
(x+2y-3z)^2+(x-2y+3z)(x+2y-3z)
=(x+2y-3z)[(x+2y-3z)+(x-2y+3z)]
=(x+2y-3z)(2x)
=2x(x+2y-3z)
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