$\"\"$

The standard form of quadratic equation in x - variables is $\"\"$ , where $\"\"$ .

The equation is $\"\"$ .

Add 9 to each side.

$\"\"$

Graph the related function $\"\"$ .

$\"The$

Observe the graph, the graph does not intersect the x - axis. So the equation has no real number of solutions. The solution set is $\"\"$ . $\"\"$

The solution set is $\"\"$ .