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

True

False

$\sqrt{-16}$√−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.

Manipulate complex numbers and present them graphically

Apply the algebra of complex numbers in solving problems