Question

is
$is \: root \: of \: - 16 \: is \: a \: rational \: no.$
​

Answer 1

Answer:

$\sqrt{ - 16} = \sqrt{ - 1} ( \sqrt{16} ) \\ \sqrt{ - 16} = 4i$

it is a complex number

complex numbers are used when a negative number is there in a root

they have given a numerical values

i= √-1

i²= -1

i³= i².i = -1(√-1)= -1

i⁴=i².i²= -1(-1)=1