问题 解答题
解方程、计算:
(1)4x2=25
(2)(x-0.7)3=0.027
(3)
(-6)2
+
327
-(
5
)2

(4)
15
+
60
3
-3
5
答案

(1)4x2=25,

x2=

25
4

解得:x=±

25
2

(2)(x-0.7)3=0.027,

x-0.7=0.3,

解得:x=1;

(3)

(-6)2
+
327
-(
5
)2

=6+3-5,

=4;

(4)

15
+
60
3
-3
5

=

3
5
+6
5
3
-3
5

=3

5
-3
5

=0.

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