(x² -5)(x² -5x-2)-24
x²-5x+24
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
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)(
已知(x-2)(x²-6x-9)=x(x-5)(x-3),求6x的算术平方根
x²/x-5+25/5-x
(x²+5x)²-2x²-10x-24
解方程x²+x-6分之5x+x²-x-12分之2x-5=x²-6x+8分之7x-10