एक (5y-1) भुजा वाले वर्ग के दृश्य मॉडल में कौन-सा विस्तार सही है?

Which expansion is correct in the visual model of a square with side (5y-1)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. \( 25y^2-10y+1 \)

Step 1

Concept

The middle term is \(-2\cdot5y\cdot1=-10y\). In exams, count the negative sign in both strips.

Step 2

Why this answer is correct

The correct answer is A. \( 25y^2-10y+1 \). The middle term is \(-2\cdot5y\cdot1=-10y\). In exams, count the negative sign in both strips.

Step 3

Exam Tip

बीच का पद \(-2\cdot5y\cdot1=-10y\) है। परीक्षा में ऋण चिन्ह को दोनों पट्टियों में गिनें।

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एक (5y-1) भुजा वाले वर्ग के दृश्य मॉडल में कौन-सा विस्तार सही है? / Which expansion is correct in the visual model of a square with side (5y-1)?

Correct Answer: A. \( 25y^2-10y+1 \). Explanation: बीच का पद \(-2\cdot5y\cdot1=-10y\) है। परीक्षा में ऋण चिन्ह को दोनों पट्टियों में गिनें। / The middle term is \(-2\cdot5y\cdot1=-10y\). In exams, count the negative sign in both strips.

Which concept should I revise for this Mathematics MCQ?

The middle term is \(-2\cdot5y\cdot1=-10y\). In exams, count the negative sign in both strips.

What exam hint can help solve this Mathematics question?

बीच का पद \(-2\cdot5y\cdot1=-10y\) है। परीक्षा में ऋण चिन्ह को दोनों पट्टियों में गिनें।