x+y=5,xy=-3.求x,y分別的值.
x+y=5,xy=-3.求x,y分別的值.
數(shù)學(xué)人氣：789 ℃時間：2020-02-03 07:43:15
優(yōu)質(zhì)解答
xy是方程a^2-5a-3=0的兩個根
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