WEBVTT

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Here is the problem: 2x plus 3x minus x.

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Simplify the polynomial expression in x.

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Read the expression.

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Combine like terms. x: 2 plus 3 minus 1 equals 4. Like terms have identical variables and exponents, so only their coefficients are added.

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Write the result in standard form. Terms are ordered by descending total degree.

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So the answer is 4x.

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After expanding and combining like terms the expression is 4x, a polynomial of degree 1 with 1 term.

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Spot check at x equals 0.73: original 2.92, simplified 2.92, which checks out.