Question

what number is equivalent to -55i to the second power

Answer 1

$\bf i=\sqrt{-1}\qquad \qquad i^2=\sqrt{-1}\cdot \sqrt{-1}\implies \sqrt{(-1)^2}\implies -1\\\\ -------------------------------\\\\ (-55i)^2\implies (-55)^2(i)^2\implies 3025\cdot i^2\implies 3025\cdot -1\implies -3025$

Answer 2

i
$= \sqrt{}$