A screenshot of a numworks calculator showing two different results for the cube root of negative 230. One is the correct answer, the other is somehow a complex number which is not correct.
So, I teach high school math and we use numworks graphing calculators. They've been excellent! However, I recently ran across an issue that shows you can't always trust what your calculator says.
Suppose you want to take the cube root of negative 230. You […]
[Original post on universeodon.com]