The graph shows solutions of equations of the form [math]\sqrt{ax + b} = cx + d[/math]. Move the sliders or type in the boxes to change the values of [i]a[/i], [i]b[/i], [i]c[/i], and [i]d[/i]. Intersections of the line [math]g(x) = cx + d[/math] and the dotted curve [math]y = -f(x)[/math] will be extraneous solutions.
How many different solutions of the equation are possible? How many can be extraneous?