①x2+﹙1/6﹚x-1/3=0②x2-2x=3③x2-4x-2=0④-2x²-x+7=0⑤3x²-
x2+﹙1/6﹚x-1/3=0②x2-2x=3③x2-4x-2=0④-2x²-x+7=0⑤3x²-x
解方程:1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x
1/(x2+3x+2)+1/(x2+5x+6)+1/(x2+7x+12)=1/(x+4)
观察下列方程:①x2-2x-2=0;②2x2+4x-1=0;③2x2-4x+1=0;④x2+6x+3=0.上面四个方程中
已知集合M={x|x2-2x>0},N={x|x2-4x+3
用配方法解下列方程①x2-2x-2=0②x2+8x-9=0③2x2+1=-3x④3x2-6x+4=0
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:(1)x2+4x=1;(2)2x2+6x=x+3;(3)3x2+4x-7=0.
(1)x2+12x=0; (2)4x2-1=0; (3)x2=7x (4)x2-4x-21=0; (5)(x-1)(x+
解方程(x2-3x)/(x2-1)+(2x-1)/(x-1)=0
解方程 x2+x-1/(x2+x)=3/2