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Which statement is correct about the degree of the zero polynomial?

Answer and explanation

Correct answer: Its degree is not defined

The direct answer is C: the degree of the zero polynomial is not defined. The degree of a non-zero polynomial is the greatest exponent having a non-zero coefficient. For example, 4x^2+1 has degree 2, and 7 has degree 0. The zero polynomial is different: every coefficient is zero, so there is no greatest exponent with a non-zero coefficient. Therefore its degree is not defined in the school-level convention. Option A is wrong because degree 0 belongs to a non-zero constant polynomial such as 5, not to the zero polynomial. Option B is wrong because there is no x term of highest power 1. Option C is correct and states the standard result. Option D is wrong because no non-zero x^2 term exists. Do not confuse the number 0 as a constant with the zero polynomial. Memory cue: non-zero constant has degree 0; zero polynomial has no defined degree.

Related tags

PolynomialZero PolynomialDegree

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