(4-i)/(2+i) - solution

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Solution for (4-i)/(2+i) equation:

D( i )

i+2 = 0

i+2 = 0

i+2 = 0

i+2 = 0 // - 2

i = -2

i in (-oo:-2) U (-2:+oo)

(4-i)/(i+2) = 0

4-i = 0 // - 4

-i = -4 // * -1

i = 4

i = 4

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