How do you simplify #(5+6i)^2#?
1 Answer
Aug 8, 2016
19 + 60i
Explanation:
Expand the brackets using, for example, the FOIL method.
#rArr(5+6i)^2=25+30i+30i+6i^2=25+60i+6i^2#
#color(orange)"Reminder" color(red)(|bar(ul(color(white)(a/a)color(black)(i^2=(sqrt(-1))^2=-1)color(white)(a/a)|)))#
#rArr(5+6i)^2=25+60i+6i^2=19+60i#
