3x²-[7x-(4x-3)-2x²]
3x²-[7x-(4x-3)-2x²]
3x⁷*x⁴+2x*x²*x⁴-4x⁵*(-x)²
(x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3
4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½
(2x-6)/(x²-4x+4)÷(3-x)/(x²+6x+9)×(2-x)/(x+3)
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|
3x²-{7x-(4x-3)-2x²=?注:x=未知数.
(x+1)/(x²+3x+2)+(x²-2x)/(x²-4)
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
(x-2分之3x-x+2分之x)乘x分之x²-4
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①x²-4/x²-4x+3÷x²+3x+2/x²-x②2x+6/4-4x+x