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# FP1 Complex Numbers Help watch

1. Here's the question:

If Z = 2p +(p-1)i is a real number, evaluate Z.

I honestly don't know where to start with this question, perhaps someone could hint me in the right direction.
2. well if it is real, the complex component (p-1) must be zero.
3. (Original post by Vanilla Poison)
Here's the question:

If Z = 2p +(p-1)i is a real number, evaluate Z.

I honestly don't know where to start with this question, perhaps someone could hint me in the right direction.
A complex number is real if and only if the imaginary part . In this case, we have
4. (Original post by Zacken)
A complex number is real if and only if the imaginary part . In this case, we have
I'm such an idiot, thank you Zacken!

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