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 expanded form of ((2x+1)(x-4))?

Answer and explanation

Correct answer: \(2x^2-7x-4\)

Use the distributive property: \((2x+1)(x-4)=2x\cdot x+2x\cdot(-4)+1\cdot x+1\cdot(-4)\). Thus, \(2x^2-8x+x-4=2x^2-7x-4\), so option A is correct. In option B, \(-8x+x\) has incorrectly been treated as \(+7x\). Exam tip: write all four products first, then combine only like terms.

Related tags

Algebraic IdentitiesBinomial ExpansionQuadratic ExpressionsDistributive PropertyPolynomialsExploring 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.