2(x2+1/ x2)-3(x+1/ x)-1=0
解方程:X2--1/8(X2+2X)+X2+2X/3(X2--1)=11
解方程 x2+x-1/(x2+x)=3/2
x2-5x+1=0则x2+x2/1
解方程:1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x
(x2+3x+9)/(x2-27)+(6x)/(9x-x2)-(x-1)/(6+2x)
已知x2+3x-1=0,求x2+1/x2+2x-2/x的值
解分式方程:1/(x2-2x-3) +2/(x2-x-6) +3/(x2+3x+2)=0
5x2-3x-5=0,求5x2-2x-1/(5x2-2x)=多少?
解方程(x2-3x)/(x2-1)+(2x-1)/(x-1)=0
先化简再求值:(x2-x)/(x-1)*(x2-1)/(x2-2x+1)其中满足方程x2-3x+2=0
解方程2/x2+x+3/x2-x=4/x2-1
2( x2 +1/x2) - 9( x + 1/x) + 14 =