How do you simplify #(-1-8i)(6-5i)#?
1 Answer
Mar 14, 2018
Explanation:
#color(orange)"Reminder"color(white)(x)i^2=(sqrt(-1))^2=-1#
#"expand the factors using FOIL"#
#rArr(-1-8i)(6-5i)#
#=-6+5i-48i+40i^2#
#=-46-43ilarrcolor(blue)"in standard form"#
