Question

| -5 3+4i 5-7i |
3. If z =| |
| 3–4i 6 8 + 7i,|
| | then z is
| 5+7i 8-7i 9 |
a. purely real
b. purely imaginary
c. a + ib, where a #0, b# 0
d. a + ib, where b=4​

Answer 1

Sorry I can’t understand the question