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Complex numbers 2 — Question 3

QCAA 2023, Paper 1 · 1 mark

Q3 · 2023 · Technology-freeSimple familiar1 mark

QUESTION 3

One solution of z3−z2−7z−2=0z^3-z^2-7z-2=0 is z=−2z=-2. Which equation could be used to determine the remaining solutions?
(A)
z2−3z−1=0z^2-3z-1=0
(B)
z2−3z+1=0z^2-3z+1=0
(C)
z2−z−1=0z^2-z-1=0
(D)
z2−z+1=0z^2-z+1=0
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