Hey guys,

Can you help me answer this question?

*Find the equation, in vertex form, of the quadratic realtion with zeors at -2 and 8 and y-intercept of 8.

Thanks :)

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- Nov 29th 2006, 03:19 PMdgolverkParabola
Hey guys,

Can you help me answer this question?

*Find the equation, in vertex form, of the quadratic realtion with zeors at -2 and 8 and y-intercept of 8.

Thanks :) - Nov 29th 2006, 04:08 PMtopsquark
You want the form:

You have zeros at (-2, 0) and (8, 0) and a y-intecept of (0, 8).

Plugging these points into the equation individually:

Or:

Probably the simplest thing to do here would be to take the last equation:

and sub it into the top two equations.

==>

==>

These turn into:

I'm going to multiply the top equation by 2 and add the bottom equation to it:

--------------------------------

Thus

So

Becomes

Finally:

So

-Dan