1samuelebrown 1samuelebrown

08-07-2020
Mathematics

contestada

If f(x) = x² + x - 4, evaluate f(2i).

Can anyone show a step by step process to get the answer?

Respuesta :

somethingiscool somethingiscool

08-07-2020

Answer:

-6+2i

Step-by-step explanation:

f(2i)=2i^2+2i-4

2i^2 is -2 because i^2 is-1, times 2 is -2.

Therefore, the equation becomes -2+2i-4, leaving the answer of -6+2i.

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