X(X+Y)(X-Y)-X(X-Y)的平方怎么写 急啊...

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X(X+Y)(X-Y)-X(X-Y)的平方怎么写  急啊...
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X(X+Y)(X-Y)-X(X-Y)的平方怎么写 急啊...
X(X+Y)(X-Y)-X(X-Y)的平方怎么写 急啊...

X(X+Y)(X-Y)-X(X-Y)的平方怎么写 急啊...
X(X+Y)(X-Y)-X(X-Y)²
=x(x-y)[(x+y)-(x-y)]
=x(x-y)(-2y)
=-2xy(x-y)

[x(x+y)(x-y)-x(x-y)]^2