Answer
-75
Work Step by Step
We know that $i=\sqrt{-1}$ and that $i^2=-1$. We also know that standard form is $a\pm bi$, where a and b are real numbers. Thus, simplifying the equation, we find:
$$ \sqrt{75}i\cdot \sqrt{75}i \\ \\ -\sqrt{5625} \\ -75$$
