यदि समीकरण \(x^2+bx+25=0\) के दोनों मूल समान हैं और उनका मान (-5) है, तो (b) क्या है?
If both roots of \(x^2+bx+25=0\) are equal and their value is (-5), what is (b)?
Explanation opens after your attempt
Correct Answer
A. (10)
Concept
Both roots are (-5), so their sum is (-10). Here the sum of roots is (-b), so (b=10).
Why this answer is correct
The correct answer is A. (10). Both roots are (-5), so their sum is (-10). Here the sum of roots is (-b), so (b=10).
Exam Tip
दोनों मूल (-5) हैं, इसलिए योग (-10) है। यहाँ मूलों का योग (-b) है, अतः (b=10)।
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