यदि (x=3) समीकरण \(2x^2+qx-15=0\) का मूल है, तो (q) का मान क्या होगा?
If (x=3) is a root of \(2x^2+qx-15=0\), what is the value of (q)?
Explanation opens after your attempt
B. (-1)
Concept
Putting (x=3) gives (18+3q-15=0), so (q=-1). If a root is given, substitute it into the equation.
Why this answer is correct
The correct answer is B. (-1). Putting (x=3) gives (18+3q-15=0), so (q=-1). If a root is given, substitute it into the equation.
Exam Tip
(x=3) रखने पर (18+3q-15=0), इसलिए (q=-1) है। मूल दिया हो तो उसे समीकरण में रखें।
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