Respuesta :

Edufirst
The complex number are formed by a real part and an imaginary part.

The imaginary part is indicated with the letter i.

2i is only imaginary, so it is not complex

i - 1 is complex but is out of the triangle.

1 - i indeed is complex and is inside the triangle

2 - 3i is complex but is out of the triangle.

So, the answer is 1 - i
Its 1-i because it is indeed complex and is inside the shaded region. i-1 is also complex but is out of the shaded area

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