bluebutterfly1
bluebutterfly1
30-03-2016
Mathematics
contestada
what is (7r - 1)(8r^2 + 8r + 1)
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olemakpadu
olemakpadu
31-03-2016
(7r - 1)(8r² + 8r + 1)
7r*(8r² + 8r + 1) - 1*(8r² + 8r + 1)
56r³ + 56r² + 7r - 8r² - 8r - 1
56r³ + 56r² - 8r² + 7r - 8r - 1
56r³ + 48r² - 8r² - r - 1
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