Question 6352
(3+6i)(5-i) becomes {{{15 - 3i + 30i -6i^2}}} which simplifies to {{{15 + 27i -6i^2}}}


Also, as {{{i^2 = -1}}}, we get {{{15 + 27i +6}}} --> {{{21 + 27i}}} --> 3(7+9i)


jon.