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In 7x⁵ − 4x³ + 8, what are the coefficients of x⁴, x², and x?

Answer and explanation

Correct answer: 0, 0, and 0

A coefficient is the numerical factor attached to a specified power of the variable. When a power is absent from a polynomial, its coefficient is understood to be zero. The expression 7x⁵−4x³+8 contains the terms 7x⁵, −4x³ and 8x⁰. It has no x⁴ term, no x² term and no x term. Therefore the requested coefficients, in the stated order, are 0, 0 and 0, making option B correct. Option A lists coefficients that belong to existing terms but assigns them to the wrong powers. Option C mistakes exponents for coefficients. Option D incorrectly transfers the coefficient −4 of x³ to x⁴ and the constant 8 to x. Missing terms are conventionally represented with zero coefficients, which is essential when comparing or adding polynomials.

Related tags

PolynomialMissing-TermsCoefficientsDegree Of A PolynomialIntroduction To PolynomialsMathematicsClass 9 Mcq

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