计算:"7/2x^2+6x"-"11-2x^2/9-x^2"+2
x/x-3-5x/x^2-x-6计算
计算:(x+7)(x-6)-(x-2)(x+2)
计算:(x+2)/(x^2 - x - 6) + 2x/(x^2 - 3x) - x/(x^2 - 6x + 9)
a*b=2×a+b 计算x*2x*3x*4x*5x*6x*7x*8x*9x=3039 x=
计算(x-2)(x-3)+2(x+6)(x-5)-3(x平方-7x+13)
计算:[x/(x^-3x)](x^2-9)
计算:(x+1)(x-2)(x-3)(x-6)
计算:(x^2+6x+10)/(x^2+6x+9)+(x^2-11)/(x^2-9)+(2x^2+8x+5)/(x^2+
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
计算: (x+3)(x²-x-2)
计算 (x+3)(x²-x-2)