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rebecca1233

  • 3 years ago

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

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  1. Mathhelp346
    • 3 years ago
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    |dw:1337737531550:dw|

  2. rebecca1233
    • 3 years ago
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    Thanks. do you know how to do this

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

  4. Mathhelp346
    • 3 years ago
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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

  5. Mathhelp346
    • 3 years ago
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    ok, give me 2 numbers

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

  7. Mathhelp346
    • 3 years ago
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    um not exactly

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

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

  10. Mathhelp346
    • 3 years ago
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    what would be your answer?

  11. Mathhelp346
    • 3 years ago
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    |dw:1337737956653:dw|

  12. rebecca1233
    • 3 years ago
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    uhmm

  13. Mathhelp346
    • 3 years ago
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    |dw:1337737995662:dw|

  14. rebecca1233
    • 3 years ago
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    times? 2 * 4 = 8

  15. Mathhelp346
    • 3 years ago
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    yes

  16. rebecca1233
    • 3 years ago
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    & 3 *5 = 15

  17. Mathhelp346
    • 3 years ago
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    yes, and...?

  18. rebecca1233
    • 3 years ago
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    so what would the end look like ?

  19. rebecca1233
    • 3 years ago
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    (8+5) ?

  20. rebecca1233
    • 3 years ago
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    (8+15)

  21. Mathhelp346
    • 3 years ago
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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.

  22. rebecca1233
    • 3 years ago
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    im so confused can you show me ?

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

  24. Mathhelp346
    • 3 years ago
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    |dw:1337738187066:dw|

  25. rebecca1233
    • 3 years ago
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    simplifying?

  26. Mathhelp346
    • 3 years ago
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    actually, we need some x's. hold on.

  27. rebecca1233
    • 3 years ago
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    the answer is 45

  28. Mathhelp346
    • 3 years ago
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    |dw:1337738245824:dw|

  29. Mathhelp346
    • 3 years ago
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    here

  30. rebecca1233
    • 3 years ago
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    Thank you.. i got it :)

  31. Mathhelp346
    • 3 years ago
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    ok

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