3x+5(x-0.18=2.

3x+5(x-0.18=2. 用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+. x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 过程(x+2)(x+3)-(x-4)(x-5),其中x=2.咋算? 1.(x*2-3x+3)/(x*2-3x+2)-(x*2-5x+7)/(x*2-5x+6)-1/(x*2-4x+3)2.1/x(x+1)+2/(x+1)(x+3)+3/(x+3)(x+6) 3.已知：x*2-3x+1=0,求x*2+1/x*2. (x-3/x-2)-(x-2/x-1)=(x-5/x4) -(x-4/x-3) 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) x-2x+3x-4x+5x.+99x-100x=25求解 2x+3x+4x+5x+x+6x+7x=100 x(x-2)-2x(x+1)-3x(x-5) 其中x=负½ x(x+1)+(x+2)+(x+3)+(x+4)+(x+5) = 27求x x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? 已知3x*x-x=1,求6x*x*x+7x*x-5x+2000 因式分解先化简再求值.【1】5x(2x+1)-(2x+3)(5x-1),其中x=13.【2】(x-1)^2(x+3)(x-3)+(x-3)(x-1),其中x^2-2x=2. 因式分解,先化简再求值【1】5x(2x+1)-(2x+3)(5x-1),其中x=13.【2】(x-1)^2(x+3)(x-3)+(x-3)(x-1),其中x^2-2x=2. 3x+5x=?x等于 3x+5x-6x=? 3x+5x=8x.