section 9.1 Evaluate the following products and ratios. Put the answer in the form
a jb
. a.
(2 4j)(7 9j)
b.
(2 4j)/(7 9j)
c.
((2 4j)(7 9j))/((3 7j)(5 2j))
d.
(-2 4j)(-7 9j)
e.
(-2 4j)/(-7 9j)