How do you multiply -0.2i(16+8i)?

1 Answer
Jim G.
Jul 25, 2016

1.6 - 3.2i

Explanation:

Distribute the bracket in the 'usual' way.

rArr-0.2i(16+8i)=(-0.2ixx16)+(-0.2ixx8i)

=-3.2i-1.6i^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-0.2i(16+8i)=-3.2i-1.6(-1)=1.6-3.2i

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