因式分解2x²y-xy-3y (-a+b)+c²(a-b)快
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因式分解2x²y-xy-3y (-a+b)+c²(a-b)快
因式分解2x²y-xy-3y (-a+b)+c²(a-b)
快
因式分解2x²y-xy-3y (-a+b)+c²(a-b)快
2x²y-xy-3y
=y(2x²-x-3)
=y(x+1)(2x-3)
(-a+b)+c²(a-b)
=c²(a-b)-(a-b)
=(a-b)(c²-1)
=(a-b)(c+1)(c-1)
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