分式计算1.(6/a^2-9)-(1/a-3)
问题描述:
分式计算1.(6/a^2-9)-(1/a-3)
2.a+5-(5/5-a)
3.x^2-4/x^2-4x+3*x-1/x^2+3x+2
答
1.6/(a²-9)-1/(a-3)=6/(a²-9)-(a+3)/(a²-9)=(6-a-3)/(a²-9)=-1/(a+3)2.a+5-5/(5-a)=a+5+5/(a-5)=[(a+5)(a-5)+5]/(a-5)=(a²-20)/(a-5)3.[(x²-4)/(x²-4x+3)]*[(x-1)/(x²+3x+2...