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

What will be the factorised form of (x^2-16x+64)?

Answer and explanation

Correct answer: ((x-8)^2)

The direct answer is A: \((x-8)^2\). A perfect-square trinomial follows \(a^2-2ab+b^2=(a-b)^2\). Here \(x^2=x^2\), the constant term is \(64=8^2\), and the middle term is \(-16x=-2\cdot x\cdot8\). Hence \(x^2-16x+64=(x-8)^2\). Expanding confirms this: \((x-8)^2=x^2-16x+64\). Option A is correct. Option B, \((x+8)^2\), expands to \(x^2+16x+64\), so its middle sign is wrong. Option C, \((x-4)^2\), expands to \(x^2-8x+16\), so both the middle coefficient and constant are wrong. Option D, \((x-16)(x+4)\), expands to \(x^2-12x-64\), not the given expression. The reliable method is to take the square roots of the first and last terms, then check whether twice their product has the correct sign and coefficient. Remember that a negative middle term requires a minus sign inside the square.

Related tags

Perfect Square TrinomialFactorisationNegative Middle Term

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.