a²-1/a²-2a + 4a-5/2a-a²=

来源：学生作业帮助网编辑：作业帮时间：2024/04/29 13:10:22

a²-1/a²-2a + 4a-5/2a-a²=
a²-1/a²-2a + 4a-5/2a-a²=

a²-1/a²-2a + 4a-5/2a-a²=
=(a^2-1-4a+5)/a(a-2)
=(a-2)^2/a(a-2)
=(a-2)/a
=1-(2/a)

原式=(a^2-1)/(a^2-2a)+(4a-5)/(2a-a^2)
=(a^2-1-4a+5)/(a^2-2a)
=(a^2-4a+4)/
=(a-2)^2/
=(a-2)/a

a²-1/a²-2a + 4a-5/2a-a²
=(a²-1)/(a²-2a)+(5-4a)/(a²-2a)
=(a²-1+5-4a)/(a²-2a)
=(a²-4a+4)/a(a-2)
=(a-2)²/a(a-2)
=(a-2)/a