已知2m²-3m-1=0,n²+3n-2=0,且mn≠1,求m²+1／n²的值

已知2m²-3m-1=0,n²+3n-2=0,且mn≠1,求m²+1／n²的值
已知2m²-3m-1=0,n²+3n-2=0,且mn≠1,求m²+1／n²的值

已知2m²-3m-1=0,n²+3n-2=0,且mn≠1,求m²+1／n²的值
除了n * n的找到m和1 / n满足方程2x ^ 2 - 3倍-7 = 0
由于Mn是不等于1,表示m不等于1 / N
用韦达定理,M +1 / N = 3/2