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Which of the following polynomials has \(x+2\) as a factor?

Answer and explanation

Correct answer: \(x^3+3x^2-4\)

By the Factor Theorem, \(x+2\) is a factor only if the polynomial becomes 0 at \(x=-2\). For option A, \(-8+12-4=0\). Option B gives \(-4\), so it is not divisible by \(x+2\). Exam tip: substitute the zero of the linear factor.

Related tags

Factor TheoremPolynomial FactorisationAlgebraic IdentitiesLinear FactorsClass 9 MathematicsFactorisationExploring Algebraic IdentitiesMathematics

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