题目内容
化简:
(1)2-3(-2a-1)+2(3a+2);
(2)6(a-
)-4(2a-
).
(1)2-3(-2a-1)+2(3a+2);
(2)6(a-
| b+c |
| 3 |
| b-c |
| 2 |
(1)2-3(-2a-1)+2(3a+2),
=2+6a+3+6a+4,
=12a+9;
(2)6(a-
)-4(2a-
),
=6a-2b-2c-8a+2b-2c,
=-2a-4c.
=2+6a+3+6a+4,
=12a+9;
(2)6(a-
| b+c |
| 3 |
| b-c |
| 2 |
=6a-2b-2c-8a+2b-2c,
=-2a-4c.
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