Graphical solution of equations_2
Author: Roger Moss

Most equations can be represented by the intersection of lines or curves on a graph. 

e.g. - the solution of 2x+5 = 0 is the x-coordinate of the point where y=2x+5 crosses y=0.

       - the solution of y = 2x+5 and y = 10-x is the pair of (x,y) values where the lines cross.

I have called the two lines f and g.  The intersection points (however many there are) are automatically labelled A, B, C etc and you can see their coordinates.  

You are starting with a cubic f: y = x^3-5x and a horizontal line g: y=3.  
Try typing in a different function definition e.g.  f: y+1 = x^2 and see what happens
Try altering the second line, e.g. g:  x+y=3
Try dragging one of the curves and watch its equation change.
You can use the toolbar to zoom in or out.

f(x) = x^(3) - 5 * x
A, B, C = Intersect(f, g)