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 the model of a square with side (x−6), two strips are removed from x². What is the area of each strip?

Answer and explanation

Correct answer: 6x

Direct answer: Option B, 6x, is correct. Begin with a square of side x, whose area is x². To change each side from x to x−6, a strip of width 6 and length x is removed along each direction. The area of one such strip is length × width=x×6=6x. The two strips together contribute 12x before the corner square of area 36 is considered, but the question asks for each strip separately. Option A gives only the width and is not an area. Option C is the combined area of two strips, not one strip. Option D is the 6×6 corner square, not a strip. A useful warning is that the two strips are each 6x, although their combined contribution is 12x.

Related tags

Strip ModelArea IdentityPerfect SquareVisual AlgebraVisual 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.