यदि \(x^2+ax+10=0\) के मूल (-2) और (-5) हैं, तो (a) का मान क्या है?
If the roots of \(x^2+ax+10=0\) are (-2) and (-5), what is the value of (a)?
Explanation opens after your attempt
Correct Answer
A. (7)
Concept
The sum of roots is (-7), and in \(x^2+ax+10=0\) the sum is (-a). Therefore (a=7).
Why this answer is correct
The correct answer is A. (7). The sum of roots is (-7), and in \(x^2+ax+10=0\) the sum is (-a). Therefore (a=7).
Exam Tip
मूलों का योग (-7) है और \(x^2+ax+10=0\) में योग (-a) होता है। इसलिए (a=7) है।
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