यदि \(x^2+ax+b=0\) की जड़ें \(4+\sqrt{7}\) और \(4-\sqrt{7}\) हैं, तो (a+b) का मान क्या है?
If the roots of \(x^2+ax+b=0\) are \(4+\sqrt{7}\) and \(4-\sqrt{7}\), what is (a+b)?
Explanation opens after your attempt
Correct Answer
B. (1)
Concept
The sum of roots is (8), so (a=-8). The product is (9), so (b=9), hence (a+b=1).
Why this answer is correct
The correct answer is B. (1). The sum of roots is (8), so (a=-8). The product is (9), so (b=9), hence (a+b=1).
Exam Tip
जड़ों का योग (8) है, इसलिए (a=-8)। गुणनफल (9) है, इसलिए (b=9), अतः (a+b=1)।
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