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(1)计算:6-5-+3;(2)计算:(+2)-;(3)解方程:x2+4x-2=0.
试题详情
(1)计算:6
-5
-
+3
;
(2)计算:
(
+2)-
;
(3)解方程:x
2+4x-2=0.
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