5x^2+8X-2=0;
5y^2-6y+4=0.
化为一般形式 (一元二次方程)
化为一般形式 (一元二次方程)
-5x^2-8x+2=0
-5y^2+6y-4=0
-5x^2-8x+2=0
-5y^2+6y-4=0
数学人气:942 ℃时间:2020-04-20 20:19:39
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