Year 11 Maths - Specialist Complex numbers

Solving equations over the complex numbers

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Questions

Question 1

56744

Answer

$ \pm 3i$

Worked Solution

$$
\begin{aligned}
Z^{2}+9&=0\\
Z^{2}&=-9\\
Z&=\pm \sqrt{-9}\\
&=\pm 3 i
\end{aligned}
$$

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