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Simplify 3x^2 - 8x + 7 + 2x^3 - x^2 + 8x - 3 Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra-basics/quadratics-polynomials-topic/polynomial-basics-core-algebra/e/adding_and_subtracting_polynomials?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI Watch the next lesson: https://www ...
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