(1)x²-2x+1/x²+9x-10≥0 (2)3x²-7x/2x²-5x-3
(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+
先化简,再求值:x×x³+(-4x²)²+24x∧7÷(-3x³) 其中x=-2
2(x+y)+(﹣5x+2y) 合并同类项 3X²-[8X﹣(5X﹣2)﹣7X²]
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
(﹣x+2x²+5)+(4x²-3-6x)
化简求值 :2x(x²-x+1)-x(2x²+2x-3) x=﹣二分之一
3-2x²+3x+3x²-5x-2x²-7
4x²-7x-3-( )=2x²-3x+8
(﹣x²+2x+5)+(4x²-3-6x)
已知多项式3-2x²+3x+3x²-5x-x²-7