问题
解答题
化简下列各式. (1)
(2)
(3)-
(4)
(5)
(6)
(7)-
(8)
|
答案
(1)
=4.16
(2)
=3.(-3)2
(3)-
=-(-
)21 2
.1 2
(4)
=3-2
.1 3
(5)
=|x|.x2
(6)
=π-3.(π-3)2
(7)-
=-((1-
)22
-1)2
=-
+1.2
(8)x4+2x2+1
=|x2+1|
=x2+1.