For what real values of \( \mathrm{x} \& \mathrm{y} \) are the numbers \( -3+\mathrm{ix}^{2} \ma...

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For what real values of \( \mathrm{x} \& \mathrm{y} \) are the numbers \( -3+\mathrm{ix}^{2} \mathrm{y} \& \mathrm{x}^{2}+\mathrm{y}+4 \mathrm{i} \) conjugate complex ?
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