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If (p(x)=(a+1)x^2+(a-2)x+5) is to be made a constant polynomial, what is possible?

Answer and explanation

Correct answer: No such \(a\) exists

For a constant polynomial, the coefficients of both the \(x^2\) term and the \(x\) term must be zero. Thus, \(a+1=0\) gives \(a=-1\), while \(a-2=0\) gives \(a=2\). The same value of \(a\) cannot be both \(-1\) and \(2\), so no such \(a\) exists. Taking \(a=-1\) removes only the \(x^2\) term; the \(x\) term still remains. Exam tip: for a constant polynomial, set the coefficient of every variable term equal to zero.

Related tags

PolynomialsConstant PolynomialCoefficientsParameterAlgebraic ExpressionsDefinition Of A PolynomialIntroduction To PolynomialsMathematics

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