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posted by Celest on Wednesday, July 31, 2013 at 4:14pm.
The sum of 5x^2 + x and -2x^2 - 3x - 1 ?
5x^2 + x -2x^2 -3x -1 = Add (algebraically) the common terms; i.e., 5x^2-2x^2 = 3x^2 x-3x = -2x and the answer is 3x^2 - 2x - 1.
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