2x^2-2x+4y-2xy-3y^2
=(2x^2-2xy-3y^2)-(2x-4y)就没了么写成二次项和一次项的差这不是完成了你的要求了么?
把多项式2x^2-2x+4y-2xy-3y^2 写成二次项和一次项的差.
把多项式2x^2-2x+4y-2xy-3y^2 写成二次项和一次项的差.
数学人气:816 ℃时间:2020-02-03 22:16:34
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