Question 165646
Note: {{{i^2=-1}}}


{{{-9i(2-i) = -9i(2)+(-9i)(-i) = -18i+9i^2 = -18i+9(-1) = -18i-9 = -9 - 18i}}}



So {{{-9i(2-i) =-9 - 18i}}}