How do you simplify #-3i*5i-3(-7+6i)#?
1 Answer
Sep 20, 2016
Explanation:
Multiply the 2 leading values, distribute the bracket and collect like terms.
#rArr-15i^2+21-18i#
#color(orange)"Reminder " color(red)(bar(ul(|color(white)(a/a)color(black)(i^2=(sqrt(-1))^2=-1)color(white)(a/a)|)))#
#rArr-15i^2+21-18i=15+21-18i=36-18i#
