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

In a square area model, one region has area x^2, two equal rectangles each have area xy, and one small square has area 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. The large figure is a square whose side is made by joining lengths x and y, so its side length is x+y and its total area is (x+y)^2. The four parts have areas x^2, xy, xy, and y^2. Adding them gives x^2+xy+xy+y^2=x^2+2xy+y^2. Option B belongs to a difference square and would require negative middle rectangles. Option C is the difference-of-squares identity, which has one positive and one negative square rather than two xy rectangles. Option D is false because (x+y)(x-y)=x^2-y^2, not x^2+y^2. Memory cue: two positive xy rectangles signal the plus-square identity.

Related tags

Algebraic IdentitiesArea ModelBinomial SquareVisual ModelsVisual 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.