Medium Mathematics Quadratic Equations Class 10 Level 30

यदि (x=4) समीकरण \(x^2+sx-32=0\) का मूल है, तो (s) का मान क्या होगा?

If (x=4) is a root of \(x^2+sx-32=0\), what is the value of (s)?

Explanation opens after your attempt
Correct Answer

A. (4)

Step 1

Concept

Putting (x=4) gives (16+4s-32=0), so (s=4). When a root is given, substitute directly.

Step 2

Why this answer is correct

The correct answer is A. (4). Putting (x=4) gives (16+4s-32=0), so (s=4). When a root is given, substitute directly.

Step 3

Exam Tip

(x=4) रखने पर (16+4s-32=0) मिलता है, इसलिए (s=4) है। मूल दिया हो तो सीधा प्रतिस्थापन करें।

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Mathematics Answer, Explanation and Revision Hints

यदि (x=4) समीकरण \(x^2+sx-32=0\) का मूल है, तो (s) का मान क्या होगा? / If (x=4) is a root of \(x^2+sx-32=0\), what is the value of (s)?

Correct Answer: A. (4). Explanation: (x=4) रखने पर (16+4s-32=0) मिलता है, इसलिए (s=4) है। मूल दिया हो तो सीधा प्रतिस्थापन करें। / Putting (x=4) gives (16+4s-32=0), so (s=4). When a root is given, substitute directly.

Which concept should I revise for this Mathematics MCQ?

Putting (x=4) gives (16+4s-32=0), so (s=4). When a root is given, substitute directly.

What exam hint can help solve this Mathematics question?

(x=4) रखने पर (16+4s-32=0) मिलता है, इसलिए (s=4) है। मूल दिया हो तो सीधा प्रतिस्थापन करें।

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