Question 144492
{{{(-6i)*(-6i)}}} Start with the given expression


{{{(-6*-6)*(i*i)}}} Group like terms



{{{36*(i*i)}}} Multiply -6 and -6 to get 36



{{{36*(i^2)}}} Multiply i and i to get {{{i^2}}}



{{{36*(-1)}}} Replace {{{i^2}}} with -1. Remember, {{{i^2=-1}}}



{{{-36}}} Multiply



So {{{(-6i)*(-6i)=-36}}}