Question

explain why 4 is a complex number? ​

Answer 1

• when we square a positive number we get a positive result.

${2}^{2} = + 4$

• when we square a negative number we also get a positive result (because a negative times a negative gives a positive)

${ - 2}^{2} = + 4$

Hope it helps u...

Answer 2

Answer:

a complex number is a number which can be expressed in the form of a+bi

where a & b are real numbers and I=√-1

4 can be represented as a+bi

where a=4 and b=0