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If (h=1), what will be the degree of ((h-1)x^6+(h+2)x^3-4x+9)?

Answer and explanation

Correct answer: \(3\)

Substituting \(h=1\) gives \((1-1)x^6+(1+2)x^3-4x+9=3x^3-4x+9\). The \(x^6\) term disappears because its coefficient is zero. The highest power of \(x\) remaining is \(3\), so the degree is \(3\). Choosing \(6\) would be incorrect because a term with a zero coefficient is not part of the polynomial. Exam tip: after substituting a parameter value, remove all zero-coefficient terms before identifying the highest exponent.

Related tags

PolynomialsDegree Of PolynomialParameter SubstitutionAlgebraClass 9 MathematicsDefinition Of A PolynomialIntroduction To PolynomialsMathematics

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