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If (m=0), what will be the degree of (mx^4+(m+2)x^3-5)?

Answer and explanation

Correct answer: 3

On substituting m=0, mx^4+(m+2)x^3-5 becomes 0x^4+2x^3-5, or 2x^3-5. The highest power of x in the remaining polynomial is 3, so its degree is 3. Option 4 is not correct because the coefficient of x^4 becomes 0, so that term vanishes. Exam tip: After substitution, 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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