题目内容
(1)计算:|
-4|-22+
(2)计算:
+6
-2X
(3)计算(
)-1×(
-
)0+
-|-
|
(4)解方程:2x2-7x+6=0
| 3 |
| 12 |
(2)计算:
| 2 |
| 3 |
| 9x |
|
|
(3)计算(
| 1 |
| 2 |
| 3 |
| 2 |
| 4 | ||
|
| 2 |
(4)解方程:2x2-7x+6=0
(1)原式=4-
-4+2
,
=
;
(2)原式=
×3
+6×
-2
,
=2
+3
-2
,
=3
;
(3)原式=2×1+
-
=2;
(4)(2x-3)(x-2)=0,
∴2x-3=0,x-2=0,
解得x1=
,x2=2.
| 3 |
| 3 |
=
| 3 |
(2)原式=
| 2 |
| 3 |
| x |
| ||
| 2 |
| x |
=2
| x |
| x |
| x |
=3
| x |
(3)原式=2×1+
| 2 |
| 2 |
(4)(2x-3)(x-2)=0,
∴2x-3=0,x-2=0,
解得x1=
| 3 |
| 2 |
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