02-11-2016
Mathematics

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simplify 5i × i × -2i = ??

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shannonmarie16 shannonmarie16

02-11-2016

5 i x i x - 2 i = 10 i

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02-11-2016

i = √-1
i² = -1
i³ = -√-1 = -i

   (5i) · (i) · (-2i)

   = (5 · 1 · -2) i³

   = -10 i³ = 10 i

Answer Link

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