आयाम (a+3) और (a+7) वाले आयत का क्षेत्र मॉडल कौन सा विस्तार देता है?

Which expansion is given by the area model of a rectangle with dimensions (a+3) and (a+7)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

C. \(a^2+10a+21\)

Step 1

Concept

The four parts are \(a^2\), (7a), (3a), and (21). Exam tip: check the sum and product of the outside numbers.

Step 2

Why this answer is correct

The correct answer is C. \(a^2+10a+21\). The four parts are \(a^2\), (7a), (3a), and (21). Exam tip: check the sum and product of the outside numbers.

Step 3

Exam Tip

चार भाग \(a^2\), (7a), (3a) और (21) हैं। परीक्षा में बाहरी संख्याओं का योग और गुणनफल देखें।

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Mathematics Answer, Explanation and Revision Hints

आयाम (a+3) और (a+7) वाले आयत का क्षेत्र मॉडल कौन सा विस्तार देता है? / Which expansion is given by the area model of a rectangle with dimensions (a+3) and (a+7)?

Correct Answer: C. \(a^2+10a+21\). Explanation: चार भाग \(a^2\), (7a), (3a) और (21) हैं। परीक्षा में बाहरी संख्याओं का योग और गुणनफल देखें। / The four parts are \(a^2\), (7a), (3a), and (21). Exam tip: check the sum and product of the outside numbers.

Which concept should I revise for this Mathematics MCQ?

The four parts are \(a^2\), (7a), (3a), and (21). Exam tip: check the sum and product of the outside numbers.

What exam hint can help solve this Mathematics question?

चार भाग \(a^2\), (7a), (3a) और (21) हैं। परीक्षा में बाहरी संख्याओं का योग और गुणनफल देखें।