2x-3x²-6-2x+2x²+5
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
计算[(x²-5x+6)/(x²-4x+3)]+[(x²-4x+3)/(x²-2
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
x/x-3-5x/x^2-x-6计算
已知(x-2)(x²-6x-9)=x(x-5)(x-3),求6x的算术平方根
6x+(2x²-3x)-(x²-1)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½
x²+3x+9/(x²-27)+6x/(9x-x²)-(x-1)/(6+2x)
(2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3)
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?