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For the complex number z = 2 + 5i, Re z and Im z are:

ARe z = 2, Im z = 5
BRe z = 5, Im z = 2
CRe z = 2 + 5, Im z = 0
DRe z = 2, Im z = 5i
Answer & Solution
Correct answer: A. Re z = 2, Im z = 5
For z = a + ib: Re z = a (real part), Im z = b (imaginary part — the COEFFICIENT of i, not the term ib itself). **So for 2 + 5i:** Re z = 2, Im z = 5.
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