Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

If the area difference between the models of ((a+b)^2) and (a^2+b^2) is asked, what is the correct difference?

Answer and explanation

Correct answer: 2ab

The direct answer is C. Expand the larger square model: (a+b)^2=a^2+2ab+b^2. The second model has area a^2+b^2. Subtracting gives [(a+b)^2]-(a^2+b^2)=(a^2+2ab+b^2)-(a^2+b^2)=2ab. In the visual picture, the larger square contains the a^2 square, the b^2 square, and two mixed rectangles, each of area ab. Removing the two square regions leaves those two rectangles, so their combined area is 2ab. A counts only one mixed rectangle. B is a length-like sum and does not represent the missing rectangular areas. D subtracts squares incorrectly and is not the difference of the two given models. Therefore C is correct. Memory cue: the extra part in (a+b)^2 beyond a^2+b^2 is exactly the two cross-rectangles, 2ab.

Related tags

Area-DifferenceBinomial-SquareCross-RectanglesVisual Models Of IdentitiesExploring Algebraic IdentitiesMathematicsClass 9 Mcq

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.