CAIE A Level Mathematics 9709 · Complex numbers

Complex numbers: calculation question

1 markFoundation

Let $z_1 = -9 - 2i$ and $z_2 = 9 + 4i$ . Find the real part of $z_1 + z_2$ .

(a)
State $\operatorname{Re}(z_1 + z_2)$ .
[1]

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