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For which value will ((m-4)x^3+7x-2) become a linear polynomial?

Answer and explanation

Correct answer: m = 4

A linear polynomial has degree 1. In the given expression, the degree-3 term is \((m-4)x^3\). Its coefficient must be zero to remove this term: \(m-4=0\). Hence, \(m=4\), and the expression becomes \(7x-2\), which is linear. For \(m=0\) or \(m=-4\), the coefficient of x³ is not zero, so the polynomial remains cubic. Exam tip: To reduce the degree of a polynomial, set the coefficient of its highest-degree term to zero.

Related tags

PolynomialsLinear PolynomialDegree Of PolynomialParameterAlgebraDefinition Of A PolynomialIntroduction To PolynomialsMathematics

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