What are the roots (
) of the parabola?
Look at the graph. Where does the parabola cross the
Read the Math Notes box for this lesson. Then solve the equation
algebraically. Did your solutions match your roots from part (a)?
Use the Quadratic Formula.
One solution is
, or .
Use the eTool below to graph the parabola.
Click the link at right for the full version of the eTool: 3-68 HW eTool (Desmos)