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 which visual situation is it most useful to read x^2+6x+9 as x^2+3x+3x+9?

Answer and explanation

Correct answer: When it is changed into a complete square of side (x+3)

The correct answer is A. The expression x^2+6x+9 can be split as x^2+3x+3x+9 because the middle term 6x is the total area of two equal 3x rectangles. In a visual square model, x^2 is one square, the two 3x pieces are side strips, and 9 is a 3-by-3 corner square. These four pieces fit together to form a square whose side is x+3. Algebraically, this is the identity x^2+6x+9=x^2+2(3x)+3^2=(x+3)^2. Option B removes an essential area and cannot make the complete square. Option C hides the two separate strips, which is less useful for showing the square. Option D changes the required model and does not explain the identity. Remember: splitting the middle term often reveals the two matching cross-rectangles.

Related tags

Complete-SquareSplit-Middle-TermVisual-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.