已知x2-5x-2014=0,求代数式(x?2)3?(x?1)2+1x2?4x+4÷2x2x2?4x的值

已知x2-5x-2014=0,求代数式(x?2)3?(x?1)2+1x2?4x+4÷2x2x2?4x的值.
2025-03-22 06:04:56
推荐回答(1个)
回答1:

∵x2-5x-2014=0,
∴x2-5x=2014,
∴原式=
(x?2)3?(x?1)2+1
(x?2)2
×
2x(x?2)
2x
=
(x?2)3?(x?1)2+1
x?2

=(x-2)2-
(x?1)2
x?2
+
1
x?2

=(x-2)2-
(x?1)2?1
x?2

=(x-2)2-
x(x?2)
x?2

=(x-2)2-x
=x2-5x+4
=2014+4
=2018;