(x²+3x+2)(x²+7x+12)-120
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
因式分解(x²+3x+2)(x²+7x+12)-120
(x²+3x+2)(x²+7x+12)-120
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
解方程(x²+3x+2)(x²-2x-1)(x²-7x+12)+24=0
1/x²+x+1/x²+3x+2+1/x²+5x+6+1/x²+7x+12,分式
3x⁷*x⁴+2x*x²*x⁴-4x⁵*(-x)²
计算: (x+3)(x²-x-2)
3x³-2x*x²
计算 (x+3)(x²-x-2)
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
解方程x²+x-6分之5x+x²-x-12分之2x-5=x²-6x+8分之7x-10