(x²-5)²+2(x²-5)+1
x(x²-1)+2x²(x+1)-3x(2x-5)计算
5x²+[x²+(5x²-2x)]-2(x²-3x),其中x=-1
((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)(
3x²-[5x-(x-2)+2x²]其中x= -1/2
代数式6x+2x²-3x+x²+1,其中x=-5
x(3x² -5x+1)-3x² (x-2)
当x=5时,(x²-x)-(x²-2x+1)等于
5/x²+x-1/x²-x=0
(x-1)(2x-1)-(x+1)2+1,其中x²-5x=14,
解方程:x(x+2)+(2x+1)(2x-1)=5(x²+3)
x(2x-1)=-3x(x+1)+5x²+3