2x^2+11x+6
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
约分 (X的平方+4x+3)(2x-x)^/(X^+X)(X^+X-6),
已知 X=4- 根号3 求 (X*X*X*X-6X*X*X-2X*X+18X+23) / (X*X-8X+15)的值
x/x-3-5x/x^2-x-6计算
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
计算:(x^2+6x+10)/(x^2+6x+9)+(x^2-11)/(x^2-9)+(2x^2+8x+5)/(x^2+
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
已知2x*x+x-5=0,求代数式6x*x*x+7x*x-13x+11的值
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
2x+3x+4x+5x+x+6x+7x=100
(x+2/x^2-x-6)-(2x/x^2-3x)-(x+1/x^2-6x+9)