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What is the coefficient of x^2 in 5x^4 − 3x^2 + x − 6?

Answer and explanation

Correct answer: −3

Answer: option B, −3. To find the coefficient of x², first locate the term containing exactly x². In the polynomial 5x⁴−3x²+x−6, that term is −3x². The numerical factor attached to x², including its sign, is −3. Therefore B is correct. Option A, 5, is the coefficient of x⁴. Option C, 1, is the coefficient of x because x can be written as 1x, but it is not the coefficient of x². Option D, −6, is the constant term and contains no x. The safest method is to match the requested power first and then read its coefficient; do not choose a coefficient merely because it is the first or largest number in the expression. The negative sign belongs to the coefficient.

Related tags

CoefficientPolynomialsTermsVariable-PowersPolynomials In One VariableMathematicsClass 10 Mcq

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