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rebecca1233

Factor each trinomial below. Please show your work and check your answer. a^2 – 5a – 20

  • one year ago
  • one year ago

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  1. Mathhelp346
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    |dw:1337737531550:dw|

    • one year ago
  2. rebecca1233
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    Thanks. do you know how to do this

    • one year ago
  3. Mathhelp346
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    all you would need to do is come up with 2 binomials and then distribute to get the answer

    • one year ago
  4. Mathhelp346
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    so if i gave you (a+b)(a+b), the answer would be a^2+ab+ba+b^2, or a^2+2ab+b^2

    • one year ago
  5. Mathhelp346
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    ok, give me 2 numbers

    • one year ago
  6. rebecca1233
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    can you give me one please cause im quite confused so like x^2 -a -25 ?

    • one year ago
  7. Mathhelp346
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    um not exactly

    • one year ago
  8. rebecca1233
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    can i use yours as one? cause im quite confused lol

    • one year ago
  9. Mathhelp346
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    so let's say you have (2+3)(4+5)

    • one year ago
  10. Mathhelp346
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    what would be your answer?

    • one year ago
  11. Mathhelp346
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    |dw:1337737956653:dw|

    • one year ago
  12. rebecca1233
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    uhmm

    • one year ago
  13. Mathhelp346
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    |dw:1337737995662:dw|

    • one year ago
  14. rebecca1233
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    times? 2 * 4 = 8

    • one year ago
  15. Mathhelp346
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    yes

    • one year ago
  16. rebecca1233
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    & 3 *5 = 15

    • one year ago
  17. Mathhelp346
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    yes, and...?

    • one year ago
  18. rebecca1233
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    so what would the end look like ?

    • one year ago
  19. rebecca1233
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    (8+5) ?

    • one year ago
  20. rebecca1233
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    (8+15)

    • one year ago
  21. Mathhelp346
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    Rebecca, there's still more. You need to distribute the 2 to both the 4 and 5. Same goes for the 3.

    • one year ago
  22. rebecca1233
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    im so confused can you show me ?

    • one year ago
  23. Mathhelp346
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    So basically, you would be solving 2*4+2*5+3*4+3*5

    • one year ago
  24. Mathhelp346
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    |dw:1337738187066:dw|

    • one year ago
  25. rebecca1233
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    simplifying?

    • one year ago
  26. Mathhelp346
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    actually, we need some x's. hold on.

    • one year ago
  27. rebecca1233
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    the answer is 45

    • one year ago
  28. Mathhelp346
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    |dw:1337738245824:dw|

    • one year ago
  29. Mathhelp346
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    here

    • one year ago
  30. rebecca1233
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    Thank you.. i got it :)

    • one year ago
  31. Mathhelp346
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    ok

    • one year ago
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