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#1 2006-01-31 13:13:44

Registered: 2006-01-29
Posts: 11

Solving Quadratic Functions by Graphing

Does any one know how to identify the roots of a quadratic equation if the equation is really long? hmm

P.S. If you need I will provide an example.


#2 2006-01-31 13:37:56

Registered: 2005-11-24
Posts: 455

Re: Solving Quadratic Functions by Graphing

Please do.

  As far as solving it by graphing, it is pretty self evident.  Graph your equation and wherever the curve meets the x axis is a root.


#3 2006-01-31 13:38:43

Registered: 2005-12-04
Posts: 3,791

Re: Solving Quadratic Functions by Graphing

What do you mean, "if the equation is really long"?  By definition, a quadratic can only have 3 terms.  It can't be any longer than that.  All quadratic equations take the form of:

ax^2 + bx + c = 0

To solve this, use the quadratic equation, or, if you have a graphing calculator, graph it and find out when it crosses the x-axis (x = 0).

"In the real world, this would be a problem.  But in mathematics, we can just define a place where this problem doesn't exist.  So we'll go ahead and do that now..."


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