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7 October, 00:33

Simplify

(4i) (-5i) (6i)

-120

-120i (incorrect)

120i

120

+4
Answers (1)
  1. 7 October, 00:37
    0
    120i

    Step-by-step explanation:

    ; i * i = - 1 ... so hence

    4i * (-5i) = - 20 i^2 ... which is - 20 (-1) = 20 ...

    then you multiply with 6i

    20 (6i) = 120i
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