(x^3-1)+(x-1)(6x+11).
求x^2-3x/x^2-6x+9*x^2-11x+30/x^2-5x-1
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
x+2/x^2-x-6 + 2x/x^3-3x - x+1/x^2-6x+9
(x+2/x^2-x-6)-(2x/x^2-3x)-(x+1/x^2-6x+9)
已知3x*x-x=1,求6x*x*x+7x*x-5x+2000
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x
(x-6)×(x-3) (x+2/1)×(x-3/1)
1/(x+3)-(x-2)/(x^2-5x+6)
(x+2)(x-3)(x-6)(x-1)=0