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Question
Find the cube-root of -216 x 1728
Solution
-216 x 1728
| 2 | 216 |
| 2 | 108 |
| 2 | 54 |
| 3 | 27 |
| 3 | 9 |
| 3 | 3 |
| 1 |
| 2 | 1728 |
| 2 | 864 |
| 2 | 432 |
| 216 |
= -(2 x 2 x 2 x 3 x 3 x 3) x (2 x 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3)
= -2 x 3 x 2 x 2 x 3
= -72
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