Medium Mathematics Quadratic Equations Class 10 Level 30

यदि (a=-2), (b=9), (c=-7) हैं, तो संबंधित द्विघात समीकरण कौन-सा है?

If (a=-2), (b=9), (c=-7), which is the corresponding quadratic equation?

Explanation opens after your attempt
Correct Answer

B. \(-2x^2+9x-7=0\)

Step 1

Concept

Substituting in \(ax^2+bx+c=0\) gives \(-2x^2+9x-7=0\). Never ignore the sign of a coefficient.

Step 2

Why this answer is correct

The correct answer is B. \(-2x^2+9x-7=0\). Substituting in \(ax^2+bx+c=0\) gives \(-2x^2+9x-7=0\). Never ignore the sign of a coefficient.

Step 3

Exam Tip

मानक रूप \(ax^2+bx+c=0\) में मान रखने पर \(-2x^2+9x-7=0\) मिलता है। गुणांक का चिन्ह कभी न छोड़ें।

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Mathematics Answer, Explanation and Revision Hints

यदि (a=-2), (b=9), (c=-7) हैं, तो संबंधित द्विघात समीकरण कौन-सा है? / If (a=-2), (b=9), (c=-7), which is the corresponding quadratic equation?

Correct Answer: B. \(-2x^2+9x-7=0\). Explanation: मानक रूप \(ax^2+bx+c=0\) में मान रखने पर \(-2x^2+9x-7=0\) मिलता है। गुणांक का चिन्ह कभी न छोड़ें। / Substituting in \(ax^2+bx+c=0\) gives \(-2x^2+9x-7=0\). Never ignore the sign of a coefficient.

Which concept should I revise for this Mathematics MCQ?

Substituting in \(ax^2+bx+c=0\) gives \(-2x^2+9x-7=0\). Never ignore the sign of a coefficient.

What exam hint can help solve this Mathematics question?

मानक रूप \(ax^2+bx+c=0\) में मान रखने पर \(-2x^2+9x-7=0\) मिलता है। गुणांक का चिन्ह कभी न छोड़ें।

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