यदि (x=2) समीकरण \(x^2+kx+2=0\) का मूल है तो (k) का मान क्या होगा?
If (x=2) is a root of \(x^2+kx+2=0\), what is the value of (k)?
Explanation opens after your attempt
B. (-3)
Concept
Putting (x=2) gives (4+2k+2=0), so (k=-3). If a root is given, substitute it in the equation.
Why this answer is correct
The correct answer is B. (-3). Putting (x=2) gives (4+2k+2=0), so (k=-3). If a root is given, substitute it in the equation.
Exam Tip
(x=2) रखने पर (4+2k+2=0) इसलिए (k=-3) मिलता है। मूल दिया हो तो उसे समीकरण में रखें।
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