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What is the coefficient of x^3 in 5x^4 + 0x^3 - 7x + 2?

Answer and explanation

Correct answer: 0

The governing concept is the coefficient of a specified term. A coefficient is the numerical factor multiplying the relevant power of the variable. In 5x^4 + 0x^3 - 7x + 2, the term involving x^3 is explicitly 0x^3. Therefore the coefficient of x^3 is 0, making option B correct. The number 5 is the coefficient of x^4, -7 is the coefficient of x, and 2 is the constant term. Those numbers belong to different terms and cannot answer the question. When an expression is simplified, 0x^3 may be omitted because it contributes nothing, but the omitted term still has coefficient zero. Since the question asks specifically for the coefficient of x^3, that zero must be recognized rather than overlooked.

Related tags

PolynomialCoefficientZero CoefficientTermsCoefficientsCommon QuestionsCommonMathematics

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