Answer:
Option A. 4+5i
Step-by-step explanation:
we know that
The form of (a + bi) is known as a complex number where a and b are real numbers and i is an imaginary number equivalent to the square root of negative 1
we have the number
[tex]4+\sqrt{-25}[/tex]
Remember
[tex]i=\sqrt{-1}[/tex]
substitute
[tex]4+\sqrt{-25}=4+\sqrt{(-1)(25)}=4+5\sqrt{(-1)}=4+5i[/tex]
