(2x-1)2-x2-4x-4=0
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(2x-1)2-x2-4x-4=0(2x-1)2-x2-4x-4=0(2x-1)2-x2-4x-4=0(2x-1)²-x²-4x-4=0(2x-1)²-(x²+
(2x-1)2-x2-4x-4=0
(2x-1)2-x2-4x-4=0
(2x-1)2-x2-4x-4=0
(2x-1)²-x²-4x-4=0
(2x-1)²-(x²+4x+4)=0
(2x-1)²-(x+2)²=0
[(2x-1)-(x+2)][(2x-1)+(x+2)]=0
(x-3)(3x+1)=0
x=3或x=-1/3
3/x2 -3x+2-1/x-2=1/x2 -x+4/x2 -2x
已知x2-4x+1=0,求x2/(x2)2-3x2+1
(x+1)(x2-x+1)+(x-2)(x2+2x+4),其中x=-3/2
(x+2)(x2-2x+4)+(x-1)(x2+x+1),其中x=-三分之二
4X2-4X+1=0X2-12X+35=0X2-2X-35=0
若X2-X-2=0,则X2-X+1/(X2-X)2-4+根号3为多少
1/(x2+x)+1/(x2+3x+2)+1/(x2+5x+6)+1/(x2+7x+12)=4/21x2是x的平方
x2+2x+2/(x+1)=(x2+4x+6)/(x+2)-1
解方程x-4/x2+x-2=1/(x-1)+(x-6)/(x2-4)
通分 3x/x2-2x,2x+1/4-x2,3/2x2+4x
(2x-1)2-x2-4x-4=0
解一元二次方程,谢x2+12x=0,4x2-1=0,x2=7x,x2-4x-21=0,(x-1)(x+3)=12,3x2+2x-1=0
当x=-2时,计算(4x2-3x)-(3x2+x+1)+(2-x2+4X)的值.
:(x2-16)/(x2+8x+16)+x/(x-4)除以1/x2-16,其中x=根号2+2
求多项式3x2+4x-2x2-x+x2-3x-1的值,其中x=-3
解方程2/x2+x+3/x2-x=4/x2-1
已知x2+5x-4=0,求x3+6x2+x+2的值已知x2+x-1=0,求x3+2x2+3的值
X2+X+1=0 X4+2X3+4X2+3X+2=?