x3-y3和x3+y3怎么因式分解
x3-y3和x3+y3怎么因式分解
其他人气:162 ℃时间:2020-01-04 07:57:41
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X³-Y³=X³-XY²+XY²-Y³=X(X²-Y²)+Y²(X-Y)=X(X-Y)(X+Y)+Y²(X-Y)=(X-Y)[X(X+Y)+Y²]=(X-Y)(X²+XY+Y²)X³...
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