问题
解答题
(1)计算:
(2)解方程:x2-3x+1=0. |
答案
(1)
+12
-31 2
=21 3
+3
-2 2
=3
+3
;2 2
(2)∵a=1,b=-3,c=1,
∴b2-4ac=9-4=5,
∴x=
.3± 5 2
(1)计算:
(2)解方程:x2-3x+1=0. |
(1)
+12
-31 2
=21 3
+3
-2 2
=3
+3
;2 2
(2)∵a=1,b=-3,c=1,
∴b2-4ac=9-4=5,
∴x=
.3± 5 2