Seudónimo
Seudónimo
22-05-2017
Mathematics
contestada
plz help..................
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Аноним
Аноним
22-05-2017
first multiply the contents of the second bracket by d then do the same procees using - 3
(d - 3)(d + 9)
= d^2 + 9d - 3d - 27
= d^2 + 6d - 27
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