化简:x2+4x−2+4x/2−x.

问题描述:

化简:

x2+4
x−2
+
4x
2−x

x2+4
x−2
+
4x
2−x
=
x2+4
x−2
4x
x−2
=
x2+4−4x
x−2
=
(x−2)2
x−2
=x-2.