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 is the difference between (x^2+2x+1) and (x^2-2x+1)?

Answer and explanation

Correct answer: (4x)

The direct answer is option B: \(4x\). Interpret “difference” as the first expression minus the second: \((x^2+2x+1)-(x^2-2x+1)\). Remove brackets carefully: \(x^2+2x+1-x^2+2x-1\). The like terms cancel: \(x^2-x^2=0\), \(1-1=0\), and \(2x+2x=4x\). Thus the difference is \(4x\). Option A, \(2x\), misses one of the two linear terms. Option B is correct because both linear contributions combine to \(4x\). Option C, \(2\), is a constant and ignores the variable terms. Option D, \(0\), would result only if the two expressions were identical, but their middle terms have opposite signs. A common mistake is to subtract the second bracket without changing the signs inside it; every sign changes when a minus sign precedes a bracket.

Related tags

Difference Of QuadraticsLike TermsIdentity

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.