5x²+17x-12化简
(2x^-5x+2/6x^+13x+6)*(6x^-5x-6/6x^-17x+10)*(12x^+8x-15/2x^-x
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
(x+2)(x-12)+(x+7)(x+8)+(x+5)(x-10),化简.
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
化简:9x-12x+5x,3x-5x-2+5x+8,3x+5+2x+3-7-11x
解方程x²+x-6分之5x+x²-x-12分之2x-5=x²-6x+8分之7x-10
解方程.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8
化简|5x+根号x²|(x<0).
(x-1)²-(x-1)(x+5)=17
3x²-【5x²+(3x²-2x)-(2x²-4x)】 化简
化简x²-x+√5
化简 (x+y)(x²-xy+y²) ; 3(2x-1)(x+6)-5(x-3)(x+6)