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What is the degree of 6x⁴ − 2x² + x − 8?

Answer and explanation

Correct answer: 4

The governing concept is that the degree of a non-zero polynomial is the largest exponent of the variable with a non-zero coefficient. In 6x^4 − 2x^2 + x − 8, the powers of x are 4, 2, 1 and 0. The coefficient of x^4 is 6, which is non-zero, so the leading term is 6x^4. Consequently, the degree of the polynomial is 4 and option C is correct. The number 2 is the exponent of the second term but not the largest exponent; 1 is the exponent of x; and 8 belongs to the constant term, not the degree. A negative coefficient does not affect the degree, and lower-power terms cannot override the highest non-zero power. Thus examining the leading term gives the answer immediately.

Related tags

PolynomialsDegreeLeading-TermHighest-PowerPolynomials In One VariableMathematicsClass 10 Mcq

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