3x-7＞-2x+3 4x-12＞0快

3x-7＞-2x+3 4x-12＞0快 求x^3-7x^2+12x因式分解,快~ 5x^4+12x^3+17x^2+9x-7 因式分解,快. *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || (x-2)(x-3)/(x+5)(x-7)＞0(x-2)(x-3)(x+2)(x+3)＞0 计算[(x-1)/(x-2)-(x-2)(x-3)-(x-3)/(x-4)+(x-4)(x-5)]/(2x-7)快 15x+5＞8x+12 20x-8≥x+15 2x-2＜54-18x 3+2x＜8-4x快 今天就要.解不等式组 3x²-[7x-(4x-3)-2x²]快给答案着急 分解因式x^3--4x^2+4x快 x^2-4x+m=(x+3)(x-7),m=加上算式,急用,快 3x方减4x=2x 快 2-2x-4/3=-x-7/6快 先化简再求值 (x+8/x^2-4x+4 - 1/2-x) ÷ x+3/x^2-2x 其中 x^2-4=0要过程,快 (x-1 )(x-2)-3x(x+3)快 x+x*2+x/3=200 求x快 X²-4X+1/3X²-7X+2≥1 （x-1)-(-2x-3)(3x-1)＞0 x²-4x+1/3X²-7X+ 2≥1 几道解不等式|x+1|＞x|x-1|+|x-2|=7(X^2-2x+1)(x+1)^3(2-x)/[(X+4)(X^2-4x+5)]>=0 x^2+4x-1=0求2x^4+8x^3-4x^3-4x^2-8x+1的值快.要有思路