0220 0220
  • 02-11-2016
  • Mathematics
contestada

simplify 5i × i × -2i = ??

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shannonmarie16
shannonmarie16 shannonmarie16
  • 02-11-2016
5 i x i x - 2 i = 10 i

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AL2006
AL2006 AL2006
  • 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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