E7linandaspet E7linandaspet

14-07-2016
Mathematics

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factor completely, then place the answer in the proper location on the grid.21a 2 - 57a 30

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HomertheGenius HomertheGenius

27-07-2016

21 a² - 57 a + 30 =
= 3 ( 7 a² - 19 a + 10 ) =
= 3 · 7 · ( a - 5/7 ) · ( a - 2 ) =
= 3 ( 7 a - 5 ) ( a - 2 )

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