CPM Homework Help : A2C Problem 9-72

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Home > A2C > Chapter 9 > Lesson 9.2.1 > Problem 9-72

9-72.

Write each of the following expressions in the form $a + bi$ .

$- 18 - \sqrt { - 25 }$

Hint (a):
$-18-\sqrt{(-1)(25)}$
Answer (a):
$− 18 − 5i$

$\frac { 2 \pm \sqrt { - 16 } } { 2 }$
Answer (b):
$1 ± 2i$

$5 + \sqrt { - 6 }$
Answer (c):
$5 + i\sqrt{6}$

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