समीकरण x² - 7x + 12 = 0 के मूल (roots) हैं:
उत्तर: (A) 3 and 4 — x² - 7x + 12 = (x-3)(x-4) = 0 → x = 3 or 4. Sum of roots = 7 (coefficient of x with sign changed), product = 12 (constant term).
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