计算:(3X²-X+5)(2X-3)
计算:5x²-[3x-(4x-3x)-2x²]
计算:3x²-[5x-(1/2x-3)+2x²]
计算 2(x²-x+1)-(-2x+3x²)+(1-x)
计算:3x²-[7x-(4x-3)-2x²]
4x²-[2x-(x²-2x+3)-2(x²-3x)] 计算
(x²-5x+6分之x²-3x+2)²/(x²-2x-3分之x-1)²
1.(3x²+2x-8)²-(x²-2x-8)²
计算:3(2x²-3xy²)-2(2xy²-3x²y)
计算:[(x²-2x+1)/(x²-1)]÷[(x-1)(x²+x)]-x
计算:(1-x/3-x)²÷(x²-6x+9/9-x²)²•1/(x
化简:1.2x²-y²+(2y²-3x²)-(2y²+x²)
已知多项式(2ax²-x²+3x+2)-(5x²-4x²+3x)的值与x无关,试