题目内容
化简与计算:
(1)
×(
-
)
(2)4
÷(-5
);
(3)
(x≥0)
(4)
+6a
-a2
.
(1)
| 8 |
| 2 |
|
(2)4
| 5 |
1
|
(3)
| 9x3+36x2 |
(4)
| 2a |
| 3 |
| -9a |
-
|
-
|
(1)原式=2
×(
-
)
=2
×
=2;
(2)原式=4
÷(-3
)
=-
;
(3)原式=
=3x
;
(4)原式=2a
+3a
+a
=6a
.
| 2 |
| 2 |
| ||
| 2 |
=2
| 2 |
| ||
| 2 |
=2;
(2)原式=4
| 5 |
| 5 |
=-
| 4 |
| 3 |
(3)原式=
| 9x2(x+4) |
=3x
| x+4 |
(4)原式=2a
| -a |
| -a |
| a |
=6a
| a |
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