यदि (3) समीकरण \(x^2+sx-12=0\) का मूल है तो (s) का मान क्या है?

If (3) is a root of \(x^2+sx-12=0\), what is the value of (s)?

Explanation opens after your attempt
Correct Answer

A. (1)

Step 1

Concept

Putting (x=3) gives (9+3s-12=0), so (s=1). Substitute the given root directly into the equation.

Step 2

Why this answer is correct

The correct answer is A. (1). Putting (x=3) gives (9+3s-12=0), so (s=1). Substitute the given root directly into the equation.

Step 3

Exam Tip

(x=3) रखने पर (9+3s-12=0) इसलिए (s=1)। दिए गए मूल को सीधे समीकरण में रखें।

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Mathematics Answer, Explanation and Revision Hints

यदि (3) समीकरण \(x^2+sx-12=0\) का मूल है तो (s) का मान क्या है? / If (3) is a root of \(x^2+sx-12=0\), what is the value of (s)?

Correct Answer: A. (1). Explanation: (x=3) रखने पर (9+3s-12=0) इसलिए (s=1)। दिए गए मूल को सीधे समीकरण में रखें। / Putting (x=3) gives (9+3s-12=0), so (s=1). Substitute the given root directly into the equation.

Which concept should I revise for this Mathematics MCQ?

Putting (x=3) gives (9+3s-12=0), so (s=1). Substitute the given root directly into the equation.

What exam hint can help solve this Mathematics question?

(x=3) रखने पर (9+3s-12=0) इसलिए (s=1)। दिए गए मूल को सीधे समीकरण में रखें।