$\"\"$

The inequality is $\"\"$ .

As the symbol is $\"\"$ and $\"\"$ , the solution lies on and above the $\"\"$ -axis.

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 lies above the $\"\"$ -axis. \ \

The solution set of the inequality is all real number. \ \

$\"\"$

Solution set is all real number.