Medium Mathematics Quadratic Equations Class 10 Level 31

यदि (x=2) समीकरण \(ax^2-5x+2=0\) का मूल है तो (a) का मान क्या है?

If (x=2) is a root of \(ax^2-5x+2=0\), what is the value of (a)?

Explanation opens after your attempt
Correct Answer

A. (2)

Step 1

Concept

Putting (x=2) gives (4a-10+2=0), so (4a=8) and (a=2). Substitute in questions with an unknown coefficient.

Step 2

Why this answer is correct

The correct answer is A. (2). Putting (x=2) gives (4a-10+2=0), so (4a=8) and (a=2). Substitute in questions with an unknown coefficient.

Step 3

Exam Tip

(x=2) रखने पर (4a-10+2=0) इसलिए (4a=8) और (a=2)। अज्ञात गुणांक वाले प्रश्न में प्रतिस्थापन करें।

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Mathematics Answer, Explanation and Revision Hints

यदि (x=2) समीकरण \(ax^2-5x+2=0\) का मूल है तो (a) का मान क्या है? / If (x=2) is a root of \(ax^2-5x+2=0\), what is the value of (a)?

Correct Answer: A. (2). Explanation: (x=2) रखने पर (4a-10+2=0) इसलिए (4a=8) और (a=2)। अज्ञात गुणांक वाले प्रश्न में प्रतिस्थापन करें। / Putting (x=2) gives (4a-10+2=0), so (4a=8) and (a=2). Substitute in questions with an unknown coefficient.

Which concept should I revise for this Mathematics MCQ?

Putting (x=2) gives (4a-10+2=0), so (4a=8) and (a=2). Substitute in questions with an unknown coefficient.

What exam hint can help solve this Mathematics question?

(x=2) रखने पर (4a-10+2=0) इसलिए (4a=8) और (a=2)। अज्ञात गुणांक वाले प्रश्न में प्रतिस्थापन करें।

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