I am working an equation using quadratic formula to solve. i got a weird answer. I just need to know if I'm on the right track. The problem is 10xsquared + 2x -5 =0

Question

I am working an equation using quadratic formula to solve.  i got a weird answer.  I just need to know if I'm on the right track.  The problem is 10xsquared + 2x -5 =0

hartnn · Answer

so what did u take the values of a,b,c as ?

anonymous · Answer

a=10, b=2, c=-5

hartnn · Answer

thats correct.. are u stuck at some step ? where ?

anonymous · Answer

At the end, I got 2 plus or minus the square root of 204 divided by 20.  All my other square roots had worked out to be perfect squares, so I just was wondering am I doing something wrong.

anonymous · Answer

Negative 2

hartnn · Answer

$\huge\frac{-2\pm \sqrt{204}}{20}$
if thats what u got then its correct

hartnn · Answer

but can be simplified!

anonymous · Answer

Woo hoo.  O.k.  Thanks.  Do I have to simplifly 2 and 20 to 1 and 10?

hartnn · Answer

yes, like this :
$\huge\frac{-2\pm \sqrt{204}}{20}=\huge\frac{-1\pm \sqrt{51}}{10}$

hartnn · Answer

did u get that^^ ?

anonymous · Answer

Yes.  Thanks so much.  Would you care to help me on one more.  I will tell you the answer I got.  I just need a good grade on this.  I"m not doing well in math.

hartnn · Answer

sure, i will help :)
just post it as another question,and close this one.