问题
解答题
(1)解方程:2x2=98 (2)计算:|2-
|
答案
(1)∵2x2=98,
∴x2=49,
∴x1=7,x2=-7;
(2)|2-
|+(32
-4)2
=2-
+32
-42
=2
-2.2
(1)解方程:2x2=98 (2)计算:|2-
|
(1)∵2x2=98,
∴x2=49,
∴x1=7,x2=-7;
(2)|2-
|+(32
-4)2
=2-
+32
-42
=2
-2.2