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
1 reads0 ratings0 helpful

A square area model is divided into four parts with areas \(x^2\), \(xy\), \(xy\), and \(y^2\). Which identity does the model represent?

Answer and explanation

Correct answer: \((x+y)^2=x^2+2xy+y^2\)

Correct answer: A, \((x+y)^2=x^2+2xy+y^2\). Add the four given areas: \(x^2+xy+xy+y^2=x^2+2xy+y^2\). The complete square has side length \(x+y\), so its total area is \((x+y)^2\). Option A matches both the outer square and the four inner regions. Option B has \(-2xy\), which would require subtractive strips and represents \((x-y)^2\). Option C represents a rectangle with sides \(x+y\) and \(x-y\), not this four-part positive square. Option D forgets the two rectangular areas and is therefore incomplete. Memory cue: two identical \(xy\) rectangles give \(2xy\); their areas are positive in this model.

Related tags

Algebraic IdentitiesVisual ModelsBinomial SquareArea ModelVisual 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.