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

A square has side a + b. It is divided into four regions with areas a², ab, ab, and b². Which algebraic identity does this visual model represent?

Answer and explanation

Correct answer: (a + b)² = a² + 2ab + b²

The correct answer is A. The entire figure is a square whose side is a + b, so its total area is (a + b)². The four non-overlapping regions have areas a², ab, ab, and b². Adding them gives a² + ab + ab + b² = a² + 2ab + b². Therefore (a + b)² = a² + 2ab + b². B has negative mixed terms and represents the square of a difference. C is the difference-of-squares identity; its factors form a rectangle and its mixed terms cancel. D omits the two ab regions, so it is not generally true. For positive a and b, the omitted 2ab is a real part of the total area. Memory cue: the square of a sum has two equal mixed rectangles, so its middle term is +2ab.

Related tags

Square Of A SumVisual Area ModelBinomial IdentityMixed 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.