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Which expression is a polynomial written in standard form?

Answer and explanation

Correct answer: x⁴ − 3x² + 2x − 7

The governing concept is the standard form of a polynomial. In standard form, like terms are combined and the remaining terms are arranged in descending powers of the variable. Option B is x⁴ − 3x² + 2x − 7, whose exponents occur in the order 4, 2, 1, and 0. It is therefore already written in standard form, so option B is correct. Option A has powers 0, 3, and 1; option C has powers 0, 1, and 2; and option D has powers 1, 5, and 0. Each of those expressions is a polynomial, but each must be rearranged to place the highest power first. Missing powers, such as x³ in option B, are completely acceptable.

Related tags

Standard FormPolynomial OrderingDescending PowersDefinition Of A PolynomialIntroduction To PolynomialsMathematicsClass 9 Mcq

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