计算:(X+Y)^5÷(-X-Y)^3*(X-Y)^2
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计算:(X+Y)^5÷(-X-Y)^3*(X-Y)^2
原式=(X+Y)^5÷(-(X+Y)^3)*(X-Y)²
=-(X+Y)^(5-3)*(X-Y)²
=-(X+Y)²(X-Y)²
=-((X+Y)(X-Y))²
=-(X²-Y²)²
=-X^4+2X²Y²-Y^4
=-(X+Y)^(5-3)*(X-Y)²
=-(X+Y)²(X-Y)²
=-((X+Y)(X-Y))²
=-(X²-Y²)²
=-X^4+2X²Y²-Y^4
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