问题
解答题
(1)计算:3
(2)解方程:(2x-1)2=x2+2x+1. |
答案
(1)原式=12
-33
+63 3
=15
;3
(2)(2x-1)2=x2+2x+1,
(2x-1)2=(x+1)2,
则2x-1=x+1,2x-1=-(x+1),
解得x1=2,x2=0.
(1)计算:3
(2)解方程:(2x-1)2=x2+2x+1. |
(1)原式=12
-33
+63 3
=15
;3
(2)(2x-1)2=x2+2x+1,
(2x-1)2=(x+1)2,
则2x-1=x+1,2x-1=-(x+1),
解得x1=2,x2=0.