Which of the following strategies cannot be used to solve the rational equation?

cannot 

a. Graph the left side as  and the right side as , and then determine the -intercept(s) of the two graphs.

b. Graph the left side as  and the right side as , and then determine the point(s) of intersection of the two graphs.

c. Rearrange the equation so it equals zero, graph the non-zero side of the equation as , and then determine the -intercept(s).

d. Rearrange the equation so it equals zero, graph the non-zero side of the equation as , graph  , and then determine the point(s) of intersection of the two graphs.