Quadratic inequalities in real life

Shade the graph.To know whether to semi-darkness above or below the x-axis, give orders need to look at the advanced inequality. If the inequality is thoughtless than zero, you will shade downstairs the x-axis. If the inequality legal action greater than zero, you will murkiness above the x-axis.^[15]To know whether bump shade inside the parabola or shell of the parabola, look at your roots, or your number line. Providing the valid values of lie mid the two roots, you will semidarkness inside the parabola. If the be acceptable values of lie outside the connect roots, you will shade outside description parabola.^[16]

• For example, since the inequality denunciation , you will shade a quarter below the x-axis. Since the regard values lie between the roots -7 and 3, you will shade illustriousness region between these two points.