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OpenStudy (anonymous):
subtract the polnomials (7sd-8s^2d+18sd^2)-(13sd^2-2sd-18s^2d) @texaschic101
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OpenStudy (texaschic101):
(7sd - 8s^2d + 18sd^2) - (13sd^2 - 2sd - 18s^2d) distribute the negative through the parenthesis 7sd - 8s^2d + 18sd^2 - 13sd^2 + 2sd + 18s^2d now combine like terms: 7sd - 2sd = 5sd -8s^2d + 18s^2d = 10s^2d 18sd^2 - 13sd^2 = 5sd^2 now we have : 10s^2d + 5sd^2 + 5sd
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