（mx²＋my²）²－4m²x²y²的分解因式

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（mx²＋my²）²－4m²x²y²的分解因式
（mx²＋my²）²－4m²x²y²的分解因式

（mx²＋my²）²－4m²x²y²的分解因式
（mx²＋my²）²－4m²x²y²
=（mx²）²+2m²x²y²+（my²）²-4m²x²y²
=（mx²）²-2m²x²y²+（my²）²
=（mx²-my²）²
=m²（x²-y²）²
=m²（x-y）²（x+y）²
=m²(x-y)(x-y)(x+y)(x+y)