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Question
Find the cube-root of - 15.625.
Solution
-15.625
= `root(3)((-15625)/(1000)`
= `sqrt((-(5 xx 5 xx 5) xx (5 xx 5 xx 5))/(10 xx 10 xx 10)`
= `(-5 xx 5)/(10)`
= `(-25)/(10)`
= - 2.5
| 5 | 15625 |
| 5 | 3125 |
| 5 | 625 |
| 5 | 125 |
| 5 | 25 |
| 5 | 5 |
| 1 |
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