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Which expression is a quadratic polynomial but not a trinomial?

Answer and explanation

Correct answer: 7x^2+5

In \(7x^2+5\), the highest power of \(x\) is 2, so it is a quadratic polynomial. It has only two terms, \(7x^2\) and 5; therefore, it is a binomial, not a trinomial. Although \(2x^2-3x+1\) is also quadratic, it has three terms. Exam tip: find the degree from the highest exponent and the type from the number of terms separately.

Related tags

PolynomialsQuadratic PolynomialBinomialPolynomial DegreeTerm ClassificationDefinition Of A PolynomialIntroduction To PolynomialsMathematics

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