How do you simplify #8(-2i)(-5-4i)#?
1 Answer
Dec 3, 2016
Explanation:
Multiply 8 and 2i together and distribute the bracket with this product.
#rArr8(-2i)(-5-4i)#
#=-16i(-5-4i)=80i+64i^2#
#color(orange)"Reminder"rarri^2=-1#
#rArr80i+64i^2=-64+80i#
