$\"\"$

The inequality is $\"\"$ .

As the symbol is $\"\"$ and $\"\"$ , the solution lies between the solutions of the equation.

The related function is $\"\"$ .

Solve the equation.

$\"\"$ (Related function)

$\"\"$ (Quadratic formula)

$\"\"$ (Substitute $\"\"$ and $\"\"$ )

$\"\"$ (Multiply)

$\"\"$ (Simplify)

$\"\"$ or $\"\"$ (Write into two equations)

Graph:

Graph the parabola.

$\"\"$

Observe the graph:

The graph is above the $\"\"$ -axis.

The solution set of the inequality is all real numbers.

$\"\"$

Solution set is all real numbers.