题目内容
(1)解方程:(x+1)2-169=0
(2)4(x+1)2-9=0
(3)计算:
+
.
(2)4(x+1)2-9=0
(3)计算:
| 3 | -8 |
| 16 |
(1)移项,得(x+1)2=169,
开方得,x+1=±13,
x1=13-1=12,x2=-13-1=-14.
(2)4(x+1)2-9=0
移项得(x+1)2=
开方得,x+1=±
,
x1=
-1=
,x2=-
-1=-
.
(3)
+
=-2+4=2.
开方得,x+1=±13,
x1=13-1=12,x2=-13-1=-14.
(2)4(x+1)2-9=0
移项得(x+1)2=
| 9 |
| 4 |
开方得,x+1=±
| 3 |
| 2 |
x1=
| 3 |
| 2 |
| 1 |
| 2 |
| 3 |
| 2 |
| 5 |
| 2 |
(3)
| 3 | -8 |
| 16 |
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