Question

Calculate {4-9i}

Answer 1

\[\Huge{4-9i}\]
\[\Huge{(2)^2-(3\sqrt{i})^2}\]
\[\Huge{(2+3\sqrt{i})(2-3\sqrt{i})}\]

Answer 2

his can be simplified like this not .calculated ... if u want still to then put i =\(\Huge\sqrt{-1}\)