计算:x2x−5+25/5−x=_.
问题描述:
计算:
+x2 x−5
=______. 25 5−x
答
+x2 x−5
=25 5−x
-x2 x−5
25 x−5
=
x2−25 x−5
=
(x+5)(x−5) x−5
=x+5,
故答案为:x+5.