Math Is Fun Forum

Chrysostomou

Member

Registered: 2009-05-25

Posts: 9

Any help!?

what this question what to do!?
Consider the quatratic expression z^2+6z+1. Show that its roots are -3+-2sq2

thanks!

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Any help!?

Hi Chrysostomou;

I assume you are setting that equation to zero.You use the quadratic formula to get the roots. If you already have them just plug them in for z.

Last edited by bobbym (2009-05-27 12:19:26)

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

karney

Guest

Re: Any help!?

When you use the quadratic formula to solve your equation a=1, b=6, and c=1.  Just plug these values into the quadratic formula to solve the equation.