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Class 10 Mathematics Medium Mcq English Medium

Consider the same result: which equation has roots 9 and 11?

Question
Consider the same result: which equation has roots 9 and 11?
x² + 20x + 99
x² - 20x + 99
x² + 20x - 99
x² - 20x - 99
Answer
x² - 20x + 99
Detailed Explanation
A monic quadratic with roots r1 and r2 is x²-(r1+r2)x+r1r2. — Examisthan.com
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