# FP1 Complex Numbers - Help please!Watch

#1

Given that the real part of z is , what is the value of a?

I tried to realise the denominator, but that just gave me quadratics. I also tried to multiply by , but that was inconclusive.
0
4 years ago
#2
(Original post by duckd0nald)

Given that the real part of z is , what is the value of a?

I tried to realise the denominator, but that just gave me quadratics. I also tried to multiply by , but that was inconclusive.
Multiply by and then consider the real part.
0
#3
(Original post by Mr M)
Multiply by

I don't understand what I do after that.
0
4 years ago
#4
(Original post by duckd0nald)

I don't understand what I do after that.
Just look at the real part.
1
#5
(Original post by Mr M)
Just look at the real part.

Like so?
0
4 years ago
#6
(Original post by duckd0nald)

Like so?
Yes. Presumably you can solve that equation?
0
#7
(Original post by Mr M)
Yes. Presumably you can solve that equation?
Ah, right. Thank you!
1
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