# Chapter 7 - Test - Page 578: 27

$26+7i$

#### Work Step by Step

Solve.$(3-4i) (2+5i)$ Need to drop the parentheses and multiply the terms. we have, $=3 (2+5i)-4i(2+5i)$ or, $=6+15i-8i-20i^2$ Since, $i^2=-1$ Hence, $=26+7i$

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.