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Which of the following expressions is a fourth-degree polynomial with an irrational coefficient?

Answer and explanation

Correct answer: \(5x^4-\sqrt{3}x+2\)

In option A, the powers of \(x\) are 4, 1 and 0, so the highest power is 4. Hence it is a fourth-degree polynomial, and \(-\sqrt{3}\) is an irrational coefficient. Option B contains \(x^{-1}\), so it is not a polynomial. Exam tip: variable exponents in a polynomial must be non-negative integers.

Related tags

PolynomialsAlgebraic ExpressionsDegree Of PolynomialIrrational CoefficientsClass 9 MathematicsIntroduction To PolynomialsMathematicsClass 9 Mcq

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