(main)[5]
After first setting up a quartic equation in $x$ or $y$, determine the square roots of $6 - 8i$ in exact Cartesian form.
Mathematics 9709 · AS & A Level · Complex numbers
Complex numbers — practice question
The square roots of $6 - 8i$ can be written in Cartesian form as $x + iy$, with $x$ and $y$ both real and exact.
Worked solution & mark scheme
This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Square $x+iy$ and match the real part to $6$ and the imaginary part to $-8$ respectively” …
- Full mark scheme, point by point
- Step-by-step worked solution
- Write your answer & get it marked instantly by AI