Practice problem
Let a=5+12ia = 5 + 12ia=5+12i. What is the value of the sum a+2a‾a + 2\overline{a}a+2a?
5−12i5-12i5−12i
15−12i15-12i15−12i
101010
15+12i15+12i15+12i
Type a concept, like “slope” or “photosynthesis”.
