Question

Pleaseeeee helppppppp

Answer 1

`\large\boxed{A.\ √(-4)}`

Explanation:

`A.\ √(-4)=√((4)(-1))=\sqrt4\cdot√(-1)=2i\ -\ \text{complex number}\\\\i-\text{imaginary unit}`

`B.\ √(13)\approx3.61\ -\ \text{real number}\\\\C.\ √(16)=4\ -\ \text{real number}\\\\D.\ \sqrt1=1\ -\ \text{real number}`