$\"\"$

The function, $\"\"$ graph is

$\"graph$

From the greaph, the x - intercept is $\"\"$ .

$\"\"$

The function, $\"\"$ and y = 0.

$\"\"$ (Substitute y = 0)

$\"\"$ (Divide each side by 20)

$\"\"$ (Add $\"\"$ to each side)

$\"\"$ (Multiply each side by $\"\"$ )

$\"\"$ (Simplify)

The value of $\"\"$ is a x - intercept of the graph of the rational function in part (a). $\"\"$

The value of $\"\"$ .