### Home > A2C > Chapter 9 > Lesson 9.3.2 > Problem9-143

9-143.

Use the method developed in problem 9-142 to do the following division problems.

1. $\frac { 2 - 5 i } { 1 - 2 i }$

Use by the conjugate to rationalize the denominator.

$\frac{(2-5\textit{i})(1+2\textit{i})}{(1-2\textit{i})(1+2\textit{i})}$

$\frac{12}{5}-\frac{1}{5}\textit{i}$

1. $\left(−3 + i\right) ÷ \left(2 + 3i\right)$

See part (a).