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For the polynomial \(6x^2y^3-5xy+9\), a student says that its degree is 3 because the highest power of \(y\) is 3. Which conclusion is correct?

Answer and explanation

Correct answer: The degree is 5 because the degree of \(6x^2y^3\) is \(2+3=5\).

In a multivariable polynomial, a term’s degree is the sum of the exponents of its variables. For \(6x^2y^3\), it is \(2+3=5\), the greatest term degree. Looking only at the exponent of \(y\) is incorrect. Exam tip: add exponents in each term.

Related tags

PolynomialsDegree Of PolynomialMultivariable PolynomialsAlgebraClass 9 MathematicsDegree Of A PolynomialIntroduction To PolynomialsMathematics

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