Question

How do you rewrite integer -7 as a complex number

Answer 1

$\bf i^2\implies i\cdot i\implies \sqrt{-1}\cdot \sqrt{-1}\implies \sqrt{(-1)^2}\implies \boxed{-1}\\\\ -------------------------------\\\\ -7\implies -1\cdot 7\implies i^27\implies 0+7i^2$