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Which of the following monic cubic polynomials has 0, 2, and −3 as its zeroes?

Answer and explanation

Correct answer: \(x^3+x^2-6x\)

If the zeroes are 0, 2, and −3, the polynomial is formed as \(x(x-2)(x+3)\). Expanding it gives \(x(x^2+x-6)=x^3+x^2-6x\), so option A is correct. Option B factors as \(x(x-3)(x+2)\), giving different zeroes. Exam tip: form one factor \((x-\text{zero})\) for each zero and then expand.

Related tags

PolynomialsZeroes Of PolynomialFactorisationCubic PolynomialsFormation Of PolynomialPolynomials In One VariableMathematicsClass 10 Mcq

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