यदि \(x^2-2x-8=0\) की जड़ें \(\alpha,\beta\) हैं, तो (\(\alpha+3\)\(\beta+3\)) का मान क्या है?
If \(\alpha,\beta\) are the roots of \(x^2-2x-8=0\), what is (\(\alpha+3\)\(\beta+3\))?
Explanation opens after your attempt
A. (7)
Concept
We use (\(\alpha+3\)\(\beta+3\)=\alpha\beta+3\(\alpha+\beta\)+9). Since \(\alpha+\beta=2\) and \(\alpha\beta=-8\), the value is (7).
Why this answer is correct
The correct answer is A. (7). We use (\(\alpha+3\)\(\beta+3\)=\alpha\beta+3\(\alpha+\beta\)+9). Since \(\alpha+\beta=2\) and \(\alpha\beta=-8\), the value is (7).
Exam Tip
(\(\alpha+3\)\(\beta+3\)=\alpha\beta+3\(\alpha+\beta\)+9) है। \(\alpha+\beta=2\) और \(\alpha\beta=-8\), इसलिए मान (7) है।
Login to save your score, XP, coins and progress.
