kaycous kaycous

29-01-2018
Mathematics

contestada

Which answer is equal to -2i*(-2i)?

A) 4

B) -4

C) 4i

D) -4i

Respuesta :

princezanila200 princezanila200

29-01-2018

I got letter B which is -4

Answer Link

jdoe0001 jdoe0001

29-01-2018

[tex]\bf \textit{recall that }i^2=-1\qquad therefore \\\\\\ -2i(-2i)\implies +2^2i^2\implies 4(-1)\implies -4[/tex]

Answer Link

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