3-2x²+3x+3x²-5x-2x²-7
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½
3x⁷*x⁴+2x*x²*x⁴-4x⁵*(-x)²
x(x²-1)+2x²(x+1)-3x(2x-5)计算
3-2x²+3x+3x²-5x-2x²-7
计算: (x+3)(x²-x-2)
3x³-2x*x²
计算 (x+3)(x²-x-2)
已知多项式3-2x²+3x+3x²-5x-x²-7
3x(x²+2x+7)-(x²+7)(3x-5)
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3