Bookworm14
  • Bookworm14
Help with Factoring? Thanks! ~Bree :) (will post below, explanation needed if possible, thanks!)
Mathematics
schrodinger
  • schrodinger
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Bookworm14
  • Bookworm14
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welshfella
  • welshfella
2a^2 - 11a + 9 = 2a^2 - 2a - 9a + 9
welshfella
  • welshfella
now you can factor the above by grouping

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welshfella
  • welshfella
Hint: take 2a out to factor the first 2 terms
Bookworm14
  • Bookworm14
how did you know to subtract 2a? (sorry this is on my review and it has completely slipped my mind)
welshfella
  • welshfella
I used the ac method you multiply the coefficient of x^2 by the last term here it is 2 * 9 = 18 i need 2 numbers whose product is + 18 and whose sum = middle part which is -11 so i write -2x - 9x
welshfella
  • welshfella
- for x read a
Bookworm14
  • Bookworm14
ohh okay, i think its coming back to me now, thank you!
welshfella
  • welshfella
yw

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