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 coefficient of x³ in the sum of p(x) = 5x⁴ − 3x³ + 2x² − x + 8 and q(x) = −2x⁴ + 7x³ − 5x² + 4x − 6?

Answer and explanation

Correct answer: 4

The governing concept is addition of like terms in polynomials. To find the coefficient of x³ in p(x) + q(x), use only the x³ terms from the two polynomials: −3x³ and 7x³. Their coefficients add as −3 + 7 = 4. The other terms affect the coefficients of x⁴, x², x, or the constant term, but they cannot change the x³ coefficient. In fact, the complete sum begins with 3x⁴ + 4x³ − 3x² + 3x + 2, confirming the result. Option A incorrectly combines the x⁴ coefficients, option C does not perform the signed addition, and option D adds magnitudes rather than algebraic coefficients. Therefore option B is correct.

Related tags

Polynomial-AdditionCoefficientLike-TermsPolynomials In One VariablePolynomialsMathematicsClass 10 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.