(9x²-12x+4)÷(3x-2)=?
(2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3)
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
分式计算x²+2x/x²-6x+9÷x²-4/x²-3x
x²+2x/x²-6x+9÷x²-4/x²-3x ,
分式计算:x²+2x/x²-6x+9÷x²-4/x²-3x
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
先化简再求值:(x+2/x²-2x - x-1/x²-4x+4)÷ x-4/x,其中x=3/2
解方程 (3x+1)(3x-1)=(x+2)(9x-4) 2(x-3)(x-2)-(x+3)²=(x-1)(x
先化解,在求值;(3x/x-1-x/x+1)÷x四次方-4x²/x³-x,其中x=根号2+2
5x+9x=6x*2+12 x+9-x/3=4
7x²-4x-3=0 -x²-x+12=0 x²-6x+9=0 (3x-2)²=