fyrozetasnem123 fyrozetasnem123

21-01-2020
Mathematics

contestada

-3i^2(-4root+5)+i^3,in simplest a+bi form

Respuesta :

devishri1977 devishri1977

21-01-2020

Answer:

Step-by-step explanation:

[tex]-3i^{2}(\sqrt{-4}+5)+i^{3}=-3*-1(i\sqrt{4}+5)+(-i)\\\\=-3(i\sqrt{4}+5)-i\\\\=-3*i\sqrt{4}+(-3)*5-i\\\\=-3i\sqrt{4}-15-i\\\\=-i(3\sqrt{4}+1)-15[/tex]

i^2 = -1

i^3 = -i

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