Question 402369
i is the standard imaginary unit with the property {{{i^2 = -1}}}
{{{(7 + 2i)(5-3i)=7*5+7*(-3i)+2i*5+2i*(-3i)=35-21i+10i-6i^2=35-11i-6*(-1)=35-11i+6=41-11i}}}