Express the roots of the equation-6x = 2x^2 + 5in simplest a+bi form.

Thoughts?

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- Jan 2nd 2011, 05:46 PMMathFailure94Roots, a+bi form
Express the roots of the equation

**-6x = 2x^2 + 5**in simplest a+bi form.

Thoughts? - Jan 2nd 2011, 05:50 PMdwsmith
Quadratic

- Jan 2nd 2011, 05:50 PMProve It

.

.

Simplify. - Jan 2nd 2011, 05:56 PMTheCoffeeMachine

Then it's just one step more to finish it up. - Jan 2nd 2011, 05:58 PMMathFailure94
Okay so I got it down to

X= -6 +/- radical[23]/4

but how do i proceed from there.

and sorry about the total lack of proper mathematical typing. i have no idea how to type actual radicals, etc. - Jan 2nd 2011, 06:02 PMdwsmith
- Jan 2nd 2011, 06:03 PMProve It
How does equal ?

- Jan 2nd 2011, 06:07 PMdwsmith
- Jan 2nd 2011, 06:17 PMMathFailure94
So I'm hazarding a guess that the roots would equal 3i/2 and i/2?

Probably completely incorrect.

I really appreciate your help, though! :) - Jan 2nd 2011, 06:21 PMdwsmith
- Jan 2nd 2011, 06:53 PMProve It
- Jan 2nd 2011, 08:31 PMmr fantastic
You have been told exactly what to do and post #6 even gives you the answer (in unsimplified form). I don't understand why (a) you would still be guessing and (b) you would be guessing wrong. You need to take a lot more care with the basic arithmetic - you have made careless and basic mistakes several times now in this thread.