解两道一元二次方程-1/2x²+3/4x+2/5=07x(x+5)+10+(9x-9)=0
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解两道一元二次方程-1/2x²+3/4x+2/5=07x(x+5)+10+(9x-9)=0
解两道一元二次方程
-1/2x²+3/4x+2/5=0
7x(x+5)+10+(9x-9)=0
解两道一元二次方程-1/2x²+3/4x+2/5=07x(x+5)+10+(9x-9)=0
知道二次方程XX 2,-2MX + M 2;-2M = 0(1)测试,以确定方程2好累啊,给我哦最好的三日子里,你详细点..A类,你不应该知道m是