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anonymous

  • one year ago

Factoring a Trinomial?

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  1. anonymous
    • one year ago
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    \[12x ^{2}-31x+7\]

  2. jim_thompson5910
    • one year ago
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    have you learned the quadratic formula?

  3. anonymous
    • one year ago
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    Yes, I've gotten every other question correct, it's just this one question that i'm getting wrong.

  4. jim_thompson5910
    • one year ago
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    ok use the quadratic formula to find the solutions to 12x^2 - 31x + 7 = 0 tell me what those roots are

  5. anonymous
    • one year ago
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    this will help you so much its a trick where you can solve any trinomial

  6. anonymous
    • one year ago
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    basically you times the first term by last term which in ur case is 12 and 7

  7. anonymous
    • one year ago
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    \[12 \times 7 = 84\]

  8. anonymous
    • one year ago
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    now you need to find two factors of 84 which if multiply gives you 84 and when add gives you -31

  9. anonymous
    • one year ago
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    so if you \[28 \times 3 = 84\]

  10. anonymous
    • one year ago
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    now in order to get -31 these two number should be -28 and -3

  11. anonymous
    • one year ago
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    \[(-28) + (-3)\]

  12. anonymous
    • one year ago
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    now you equation will be \[12x ^{2} -3x -28x +7\]

  13. anonymous
    • one year ago
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    now only thing you have to do is factor it , can u plz do that if u have trouble i ll help u

  14. skullpatrol
    • one year ago
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    |dw:1442412239372:dw|

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