4x²-{-3x²-[5x-x²-(2x²-x)]+4x},其中x=½
x(x²-1)+2x²(x+1)-3x(2x-5)计算
(x-2)(x-3)+2(x+6)(x-5)-3(x²-7x+13)化简
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
5x²+[x²+(5x²-2x)]-2(x²-3x),其中x=-1
计算[(x²-5x+6)/(x²-4x+3)]+[(x²-4x+3)/(x²-2
((x²-5x+6)/(12-7x+x²))²÷((x²+3x+2)/(x
计算:[(-5+x)(-x-5)]² (x+3)²-(x+2)(x-1) (3x-a)(3x+a)(
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
|X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10|