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What is the total degree of x^5y^2z^4 + 3x^3yz^7 − 10?

Answer and explanation

Correct answer: 11

For a multivariable polynomial, first find the total degree of each term by adding the exponents of all variables in that term. The term x^5y^2z^4 has total degree 5+2+4=11. In 3x^3yz^7, the coefficient 3 does not affect degree and the unmarked y has exponent 1, so its total degree is 3+1+7=11. The constant term −10 has degree 0. The degree of the entire polynomial is the greatest total degree among its terms, which is 11. Therefore option B is correct. Option A may result from omitting one exponent, option C comes from an incorrect addition, and option D is not the total degree of any term in the expression.

Related tags

PolynomialTotal DegreeMultivariable PolynomialIntroduction To PolynomialsDegree Of A PolynomialMathematicsClass 9 Mcq

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