4x-1+1/(4x-5)怎么变成(4x-5)+1/(4x-5)+4

如题所述

第1个回答  2012-07-03
4x-1+1/(4x-5)
=4x-(5-4)+1/(4x-5)
=4x-5+4+1/(4x-5)
=4x-5+1/(4x-5)+4
第2个回答  2012-07-03
4x - 1 + 1/(4x-5)
=> 4x - 1 + 1/(4x-5) - 4 + 4
=> 4x - 1 - 4 + 1/(4x-5) + 4
=> (4x - 5) + 1/(4x-5) + 4
第3个回答  2012-07-03
4x-1+1/(4x-5)
=(4x-5+4)+1/(4x-5)
=(4x-5)+1/(4x-5)+4本回答被提问者采纳