Question
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Answer (Detailed Solution Below)
Option 1 : 41
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Detailed Solution
सही उत्तर 41 है।
Key Points
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prepsnap.in • Part -AQuestion:
If α and β are the roots of x² − 9x + 20 = 0, what is the value of α² + β²? / यदि α और β समीकरण x² − 9x + 20 = 0 के मूल हैं, तो α² + β² का मान क्या है?
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41
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61
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121
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81
Correct Answer: 41
α + β = 9 and αβ = 20, so α² + β² = (α + β)² − 2αβ = 81 − 40 = 41. / α + β = 9 और αβ = 20, अतः α² + β² = (α + β)² − 2αβ = 81 − 40 = 41।
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