WEBVTT

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Here is the problem: (2x plus 6) squared minus (3x plus 1).

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Expand and simplify the polynomial into standard form.

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Distribute every product and power. Multiply each term of one factor by each term of the other; expand powers by repeated multiplication.

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Combine like terms and order by degree.

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Read off the key features. degree 2, leading coefficient 4, constant term 35.

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So the answer is 4x squared plus 21x plus 35.

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In standard form the polynomial is 4x squared plus 21x plus 35 (degree 2, leading coefficient 4, constant term 35).

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Spot check at x equals 2: original and expanded form both give 93.