化简:1.(x²-4/x²-4x+4-x-2/x+2)÷x/x-2
问题描述:
化简:1.(x²-4/x²-4x+4-x-2/x+2)÷x/x-2
2.(a+2/a²-2a-a-1/a²-4a+4)÷4-a/a²-2a
3.x²+9x/x²+3x+x²-9/x²+6x+9
解方程
1.x+1/x-1-4/x²-1=1
2.1/x+2+1/x=32/x²+2x
3.3x+4/3x-5+1=4x+1/2x-3
答
.(x²-4/x²-4x+4-x-2/x+2)÷x/x-2=[(x-2)(x+2)/(x-2)²-(x-2)/(x+2)]÷x/(x-2)=[(x+2)/(x-2)-(x-2)/(x+2)]*(x-2)/x=(x²+4x+4-x²+4x-4)/(x-2)(x+2)*(x-2)/x=8/(x+2)2.(a+2/a²-2a-a-1/...