=(x-y)[(3x+y)-(2x+3y)]*(x-y)
=(x-y)*(x-y)(3x+y-2x-3y)
=(x-y)(x-y)(x-2y)
到底是化簡(jiǎn),還是?
=(x*x-2xy+y*y)(x-2y)
=x^3-4x*x*y+5xy*y-2y^3
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
數(shù)學(xué)人氣：199 ℃時(shí)間：2020-06-03 15:15:17
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