यदि (-3) समीकरण \(x^2+ux-18=0\) का मूल है तो (u) का मान क्या है?
If (-3) is a root of \(x^2+ux-18=0\), what is the value of (u)?
Explanation opens after your attempt
A. (-9)
Concept
Putting (x=-3) gives (9-3u-18=0), so (u=-3), not (u=3).
Why this answer is correct
The correct answer is A. (-9). Putting (x=-3) gives (9-3u-18=0), so (u=-3), not (u=3).
Exam Tip
(x=-3) रखने पर (9-3u-18=0) इसलिए (u=-3) नहीं बल्कि (u=-3)?
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