Multiply Write Your Answer in a +Bi Form $(4+2 \mathrm{i})(5-7 \mathrm{i})$

Multiple Choice

Multiply. Write your answer in a +bi form.
- $(4+2 \mathrm{i}) (5-7 \mathrm{i})$

A) $-14 i^{2}-18 i+20$
B) $34+18 \mathrm{i}$
C) $6+38 i$
D) $34-18 \mathrm{i}$