What values of c and d would make the following expression represent a real number? i(2 + 3i)(c + di)
a. c = 2, d = 3.
b. c = –2, d = 3.
c. c = 3, d = –2.
d. c = –3, d = –2.

Shape a is congruent to shape , as shown by a reflection across the y-axis and then a translation down units. shape b is congruent to shape , as shown by a reflection across the y-axis and then a translation down units.