Mathematics (AS & A Level) · May / June 2025 · Paper 32 · Question 5
9709
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The square roots of 1 4 5i - - can be expressed in the Cartesian form x yi + , where x and y are real and exact. By first forming a quartic equation in x or y, find the square roots of 1 4 5i - - in exact Cartesian form. [5]
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