因式分解a²x²-4+a²y²-2a²xy
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因式分解a²x²-4+a²y²-2a²xy
因式分解a²x²-4+a²y²-2a²xy
因式分解a²x²-4+a²y²-2a²xy
a²x²-4+a²y²-2a²xy
=a²(x²-2xy+y²)-4
=a²(x-y)²-2²
=(ax-ay+2)(ax-ay-2)
(ax-ay+2)(ax-ay-2)
a²x²-4+a²y²-2a²xy
=a²(x-y)²-4
=(ax-ay+2)×(ax-ay-2)