2a⼀(a^2-4)-1⼀a+2化简

2024-10-31 10:08:10
推荐回答(2个)
回答1:

2a/(a^2-4)-1/a+2
=2a/(a+2)(a-2)-1/a+2,其中2a/(a^2-4)=1/(a+2)+1/(a-2)
=1/(a+2)+1/(a-2)-1/a+2
=1/(a-2)

回答2:

=2a/(a²-4)-(a-2)/(a²-4)=(a+2)/(a²-4)=1/(a-2)