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I was trying to find the zeroes. Is it right?

2/10 and -6/10
you probably should simplify these to 1/5 and -3/5

Yes, I did. So it's right?

oh, one subtlety!
\[ \frac{-2 \pm \sqrt{-16}} {10 } \]

the square root of -16 is sqrt(16) * sqrt(-1)
or
4 i (we use i for the square root of -1)

So, I put i after the top negative number?

one root is
\[ \frac{-1}{5} + \frac{2}{5} i \]
the other is
\[ \frac{-1}{5} - \frac{2}{5} i \]

You mean 3/5?

\[\frac{-2 \pm \sqrt{-16}} {10 } \\ \frac{-2 \pm 4i }{10 }\\
\frac{-2}{10} \pm \frac{4}{10} i \]

and finally
\[ - \frac{1}{5} \pm \frac{2}{5} i \]

But, isn't the square root of -16, -4?

Ok, sorry, not very good at math, I'm a history and English guy.

just remember \( \sqrt{-16} = 4i \)

Ok, thanks!!!