NZ Level 8 (NZC) Level 3 (NCEA) [In development]
Operations with Negative Surds

## Interactive practice questions

$-\sqrt{81}$81 is a real number. True or false?

True

A

False

B

True

A

False

B
Easy
Less than a minute

$\sqrt{-16}$16 is a real number. True or false?

Express $\sqrt{-100}$100 in terms of $i$i.

Express $-\sqrt{-100}$100 in terms of $i$i.

### Outcomes

#### M8-9

Manipulate complex numbers and present them graphically

#### 91577

Apply the algebra of complex numbers in solving problems