Answer:
Option A. no real root.
Step-by-step explanation:
We have to find the real square roots of [tex](-\frac{9}{16})[/tex].
We can write the term as [tex]\sqrt{-\frac{9}{16}}=\sqrt{\frac{9.(-1)}{16}}[/tex]
=[tex]\pm \frac{3}{4}i[/tex] [ As we know √(-1) = i ]
Since it's an imaginary number therefore we can say square root of any negative number is an imaginary number.
Therefore Option A. no real roots is the correct option.