﹙x²-y²﹚﹙x+y﹚-﹙x-y﹚³ 用公式法 因式分解
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﹙x²-y²﹚﹙x+y﹚-﹙x-y﹚³用公式法因式分解﹙x²-y²﹚﹙x+y﹚-﹙x-y﹚³用公式法因式分解﹙x²-y²
﹙x²-y²﹚﹙x+y﹚-﹙x-y﹚³ 用公式法 因式分解
﹙x²-y²﹚﹙x+y﹚-﹙x-y﹚³ 用公式法 因式分解
﹙x²-y²﹚﹙x+y﹚-﹙x-y﹚³ 用公式法 因式分解
原式=(x+y)²(x-y)-(x-y)³
=(x-y)[(x+y)²-(x-y)²]
=(x-y)(x+y+x-y)(x+y-x+y)
=4xy(x-y)
(X+Y)^2(X-Y)-(X-Y)(X^2+XY+Y^2)
=(X-Y)(X^2+2XY+Y^2-X^2-XY-Y^2)
=(X-Y)XY
﹙x²-y²﹚﹙x+y﹚-﹙x-y﹚³ =(X+Y)(X-Y)(X+Y)-(X-Y)3=(X-Y)((X+Y)2-(X-Y)2)=4XY(X-Y)