Blog post week 12
5.3 Graphing Quadratic Inequalities in two variables.
Solve the inequality as though it were an equation.
The real solutions to the equation become boundary points for the solution to the inequality.
Make the boundary points solid circles if the original inequality includes equality; otherwise, make the boundary points open circles.
Select points from each of the regions created by the boundary points. Replace these “test points” in the original inequality.
If a test point satisfies the original inequality, then the region that contains that test point is part of the solution.
Represent the solution in graphic form and in solution set form.