# What is the square root of -10 times the root of -40?

##### 2 Answers

#### Explanation:

You can't simply join the roots together, like

#### Explanation:

Use these two complex number definitions/rules to simplify the expression:

Sep 20, 2015

You can't simply join the roots together, like

Sep 20, 2015

Use these two complex number definitions/rules to simplify the expression: