7.6 Exercise 124

Solve Rational Equations that Involve Functions

For rational function, $f \left(x\right) = \frac{x + 2}{x^{2} - 6 x + 8} ,$ ⓐ find the domain of the function ⓑ solve $f \left(x\right) = 1$ ⓒ find the points on the graph at this function value.