Solve each of the following inequalities. Express the solutions algebraically and on a number line.
Plot the boundary point. Should it be shaded or not? Test values on either side of
. Which side makes it true?
See part (a). Rearrange the equation so that it equals zero.
The equation can't be factored. Use the Quadratic Formula.
Plot the boundary points. Test a point between them. Does it make the inequality true? If so, shade between.
If not, test points on the outside.