已知0≤x≤3,化简x2+(x−3)2=_.

问题描述:

已知0≤x≤3,化简

x2
+
(x−3)2
=______.

∵0≤x≤3,

x2
+
(x−3)2

=x-(x-3)
=x-x+3
=3.
故答案为:3.