joannaaaa joannaaaa
  • 19-06-2018
  • Mathematics
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Someone please help me I’m not good in math

Someone please help me Im not good in math class=

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kalistam01
kalistam01 kalistam01
  • 19-06-2018
The missing factor is (a -1) I believe. If you foil (5a + 9)(a - 1) you would get 5a^2 + 4a - 9.
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