p²(X+Y)²-q²(X-Y)² 因式分解
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p²(X+Y)²-q²(X-Y)²因式分解p²(X+Y)²-q²(X-Y)²因式分解p²(X+Y)²
p²(X+Y)²-q²(X-Y)² 因式分解
p²(X+Y)²-q²(X-Y)² 因式分解
p²(X+Y)²-q²(X-Y)² 因式分解
原式为：p²(x＋y)²－q²(x－y)²
=[p(x＋y)]²－[q(x－y)]²
=[p(x＋y)＋q(x－y)][p(x＋y)－q(x－y)]
=(px＋py＋qx－qy)(px＋py－qx＋qy)
p²(X+Y)²-q²(X-Y)²
=[p(X+Y)-q(X-Y) ][p(X+Y)+q(X-Y) ]
=(pX+pY-qX+qY) (pX+pY+qX-qY)
(p(x+y)+q(x-y))(p(x+y)-q(x-y))