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Which expression is not quadratic in (x)?

Answer and explanation

Correct answer: \(x^3+x^2+1\)

A quadratic expression has highest power 2, with a non-zero coefficient of \(x^2\). In \(x^3+x^2+1\), the highest power of \(x\) is 3, so it is a cubic expression, not a quadratic one. Each of the other expressions has highest power 2. Exam tip: to find the degree of a polynomial, check the highest power of the variable after simplification.

Related tags

Quadratic ExpressionsPolynomial DegreeCubic ExpressionAlgebraic IdentitiesClass 9 MathematicsExploring Algebraic IdentitiesMathematicsClass 9 Mcq

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