Perform the indicated operations on the resulting expressions if the given changes are made in the indicated examples of this section.

In Example 3(b), change the sign in the second denominator from + to − and then simplify.

Data from Exercises 3(b)

j + 2 3+j = = = (3 + j) + 2j j(3 + j) = -3-12j9j 1 - 9j 3 - 6j 5 3 + 3j 3j-1 = = 6 - 12j 10 3+3j 1- 3j 1+3j-1-3j