(3x-5)² -(2x 7)²
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
(1/x²+x)+(1/x²+3x+2)+(1/x²+5x+6)+(x²+7x+
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
3-2x²+3x+3x²-5x-2x²-7
已知多项式3-2x²+3x+3x²-5x-x²-7
解方程.(5x/x²+x-6)+(2x-5/x²-x-12)=7x-10/x²-6x+8
3x(x²+2x+7)-(x²+7)(3x-5)
解分式方程1/(x²+3x+2)+1/(x²+5x+6)+1/(x²+7x+12)1/(x
x(3x² -5x+1)-3x² (x-2)
(8-7x-6x²+2x³)+(x³+5x²+4x-1)-(-x²-3
计算:(-x³-3x²+7x-8)-(3x³-2x²-5x+4)-(-x
(x+2)(x-3)>(-x-3)² -1 (2x-5)(2x+5)<(x-3)(4x+7)