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For example, if you have 3x2+5x and 2x2−4x+7, you would add the coefficients of the x2 terms together and the coefficients of the x terms together.

A graph showing 3x to the power of 2. It has the 3 labeled as the coefficient, the x as the variable and the power of 2 as the exponent. A black dotted line. A black dotted line.