The equation x 2 + px +q = 0 and x 2 + qx +p = 0 ( p ≠ q ) have a common root. what is the value of (p + q) ?

UPSC CDS I 2025 Mathematics Paper

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The equation x² + px +q = 0 and x² + qx +p = 0 ( p ≠ q ) have a common root. what is the value of (p + q) ?

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