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

If a visual square is made for (z²−12z+36), what will be its side?

Answer and explanation

Correct answer: z−6

The correct answer is B: the side is z−6. Recognize the expression as a perfect-square trinomial. Using (a−b)²=a²−2ab+b², take a=z and b=6. Then (z−6)²=z²−2(z)(6)+6²=z²−12z+36, exactly the given expression. Option A, z+6, would produce (z+6)²=z²+12z+36, with a positive middle term. Option B is correct because it gives the required negative middle term and the constant 36. Option C, z−12, would produce z²−24z+144, so both the middle and final terms are wrong. Option D, z+36, would produce z²+72z+1296, which is also incorrect. In a visual model, the z² square and the 36 square are joined with two negative z-by-6 strips, giving −12z. Memory cue: half the magnitude of the middle coefficient is 6, and the negative sign gives z−6.

Related tags

Perfect Square TrinomialNegative SquareVisual ModelAlgebraic IdentitiesVisual 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.