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If the zero of (p(x)=2x+a) is (-3), what is the value of (a)?

Answer and explanation

Correct answer: \(6\)

A zero of a polynomial is a value for which the polynomial becomes 0. Hence, \(p(-3)=0\). So, \(2(-3)+a=0\Rightarrow -6+a=0\Rightarrow a=6\). If \(a=-6\), then \(2(-3)-6=-12\), not 0. Exam tip: Substitute the given zero for \(x\) and set the polynomial equal to 0.

Related tags

PolynomialsLinear PolynomialsZeros Of PolynomialsSubstitutionAlgebraIntroduction To PolynomialsMathematicsClass 9 Mcq

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