Multiply
- $(5+4 \mathrm{i})(8-9 \mathrm{i})$ A) $76+13 i$ B) $-36 i^{2}-13 i+40$ C) $4+77 \mathrm{i}$

Multiple Choice

Multiply.
- $(5+4 \mathrm{i}) (8-9 \mathrm{i})$

A) $76+13 i$
B) $-36 i^{2}-13 i+40$
C) $4+77 \mathrm{i}$
D) $76-13 \mathrm{i}$