化简:1.(a+2-4/2-a)÷(a/a-2) 2.3/x-6/1-x-x+5/x²-x3.(a+2/a²-2a-a-1/a²-4a+4)÷4-a/a²-2a
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化简:1.(a+2-4/2-a)÷(a/a-2) 2.3/x-6/1-x-x+5/x²-x3.(a+2/a²-2a-a-1/a²-4a+4)÷4-a/a²-2a
化简:1.(a+2-4/2-a)÷(a/a-2) 2.3/x-6/1-x-x+5/x²-x
3.(a+2/a²-2a-a-1/a²-4a+4)÷4-a/a²-2a
化简:1.(a+2-4/2-a)÷(a/a-2) 2.3/x-6/1-x-x+5/x²-x3.(a+2/a²-2a-a-1/a²-4a+4)÷4-a/a²-2a
1.(a+2-4/2-a)÷(a/a-2)
=(a²-4+4)/(a-2)×(a-2)/a
=a²/(a-2)×(a-2)/a
=a
2.3/x-6/1-x-x+5/x²-x
=3/x+6/(x-1)-(x+5)/x(x-1)
=(3x-3+6x-x-5)/x(x-1)
=8(x-1)/x(x-1)
=8/x
3.(a+2/a²-2a-a-1/a²-4a+4)÷4-a/a²-2a
=[(a+2)/a(a-2)-(a-1)/(a-2)²]×a(a-2)/[-(a-4)]
=[(a+2)(a-2)-a(a-1)]/a(a-2)² ×a(a-2)/[-(a-4)]
=-1/(a-2)
化简(a/a-2-a/a+2)×4-a/a(a/a-2-a/a+2)×4-a/a
化简:(a-a/a+1)÷(a²-2a)/(a²-4)×1/(a+2)
化简:[(a-2)/(a²+2a)-(a-1)/(a²+4a+4)]÷(a-4)/(a+2)
化简:{(a+2/a²-2a)-(a-1/a²-4a+4)}÷(a-4/a)
化简; a-2a+3a-4a+5a-6a+``````-2006a+2007a.
化简:a-2a+3a-4a+5a-6a+.+2010a+2011a.
化简a-1/a²+4a+4÷1-a/a²+2a
化简(2a-b/a+b-b/a-b)÷a-2a/a-b
化简(a/a-2-a/a+2)*4-a的平方/a
1.化简.(1).【[(a+2)/(a^2-2a)]+[8/(4-a^2)]】/【(a-2)/a】
【1】a+a=a×a a= [ ]【2】a×a=a÷a a=[ ]【3】a×a=a-a a=[ ] [4]a-a=a+a a=[ ]
化简(a+b-根号ab分之a根号a+b根号b)+(a-2根号a分之根号a+2)÷(a-4分之根号a)
化简 a/a-1 - a-1/a+2÷a²-1/ a²+4a+4
化简(—a^3+3a^2-7a+5)+(5a^-6a)-(a^3-4a+7)
化简(—a^3+3a^2-7a+5)+(5a^-6a)-(a^3-4a+7)
[(a/a-2)-(a/a+2)]÷4a/2-a,其中a=-1/2
(1-16a×a×a×a)÷(4a×a+1)÷(2a+1)²
(1-16a×a×a×a)÷(4a×a+1)÷(2a+1)