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For example, the term 2x in x² + 2x + 1 is a linear term in a quadratic polynomial. The polynomial 0, which may be considered to have no terms at all, is called the zero polynomial. Unlike other constant polynomials, its degree is not zero.

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Use binomial theorem \left(a+b\right)^{2}=a^{2}+2ab+b^{2} to expand \left(2x+6\right)^{2}. \left(2x+6\right)^{2} Multiply 2x+6 and 2x+6 to get \left(2x+6\right)^{2}.

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