Posted by **joanieday** on Friday, March 25, 2011 at 3:57pm.

How do I read the equation (function) y=-0.03x^2+0.14x+1.43?

Do I have to complete the square to find the vertex, max., min., etc.? This function is part of a word problem that I am trying to do. I would appreciate any help.

- Algebra -
**Lina**, Friday, March 25, 2011 at 10:22pm
Well, you could multiply everything by 100 to get an easier function:

y=-3x^2+14x+143

in which you could try and use the quadratic theorem

[-b +/- sqrt(b^2-4ac)]/2a

Giving you:

-14 +/- sqrt(196-(-1716)/-60

[-14 +/- sqrt(1912) ]/-6

You cant simplify too much. But you get the idea from here. Is this the answer you were looking for?

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