x²+3x-1=0,1/(x-2)×(x²-4x+4)/(x+1)-(x-1)/(x+2)
来源:学生作业帮 编辑:作业帮 分类:综合作业 时间:2024/05/17 06:50:22
x²+3x-1=0,1/(x-2)×(x²-4x+4)/(x+1)-(x-1)/(x+2)
x²+3x-1=0 x²+3x=1
1/(x-2)×(x²-4x+4)/(x+1)-(x-1)/(x+2)
=(x²-4x+4)/(x-2)(x+1)-(x-1)/(x+2)
=(x-2)²/(x-2)(x+1)-(x-1)/(x+2)
=(x-2)/(x+1)-(x-1)/(x+2)
=(x-2)(x+2)/(x+1)(x+2)-(x-1)(x+1)/(x+1)(x+2)
=(x²-4-x²+1)/( x²+3x+2)
=(-3)/3
=-1
1/(x-2)×(x²-4x+4)/(x+1)-(x-1)/(x+2)
=(x²-4x+4)/(x-2)(x+1)-(x-1)/(x+2)
=(x-2)²/(x-2)(x+1)-(x-1)/(x+2)
=(x-2)/(x+1)-(x-1)/(x+2)
=(x-2)(x+2)/(x+1)(x+2)-(x-1)(x+1)/(x+1)(x+2)
=(x²-4-x²+1)/( x²+3x+2)
=(-3)/3
=-1
化简{x²-2x分之x+2-x²-4x+4x分之x-1}除以X分之(x-1)(X-4)乘以(2-x)
[(x+2)/(x²+2x)-(x-1)/(x²-4x+4)]÷(x-4)/x
先化简再求值:(x+2/x²-2x - x-1/x²-4x+4)÷ x-4/x,其中x=3/2
(1) x-3/x-2 - x-5/x-4=x-7/x-6 - x-9/x-8
3X+(X+2)+(X+1)*(X-1)=4*(X²+8)
(x-2)²=(2x-3)² x²-4x=0 3x(x+1)=3x+3 x²-2
x²+3x-1=0,1/(x-2)×(x²-4x+4)/(x+1)-(x-1)/(x+2)
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
(x-1)^3(x+1)(x-2)/(x+4)
(x+1)(x+2)(x+3)(x+4)+1
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
3x(x²+2x²+1)-x(x-2)(2x+4)=?