Question 203261
Graph:
{{{f(x) = abs(x^2-4)}}}
{{{graph(400,400,-5,5,-5,5,abs(x^2-4))}}}
Consider:
{{{K = abs(x^2-4)}}} The graph is shown and K is the vertical axis.
a) There are four solutions for K = 2. (for example)
b) There are two solutions for K > 4.
c) There are no solutions for K < 0 (i.e. negative K)