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What is the highest power of the variable in a quadratic expression?

Answer and explanation

Correct answer: (2)

The direct answer is option B: 2. A quadratic expression is defined by the highest power of its variable being 2. It may look like ax²+bx+c, where a is not zero; the other terms can have powers 1 or 0, but none can have a power greater than 2. For example, 3x²−5x+7 is quadratic because the largest exponent is 2. Option A, 1, describes a linear expression, whose highest power is 1. Option B is correct because the word quadratic is connected with square, and x² is the highest power. Option C, 3, describes a cubic expression, not a quadratic one. Option D, 0, describes a constant expression, which has no variable term. Always inspect the highest exponent, not the number of terms or the coefficient. Memory cue: linear 1, quadratic 2, cubic 3.

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Quadratic ExpressionsDegreeAlgebra

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