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anonymous

  • 5 years ago

im having major issues factoring this trinomial i know it is not prime so it has to have a solution i just cant figure the solution out the teacher said there is only one prime trinomial and that was number 4 he told me that one but the trinomial i need help on is 10d^2+17d-20 need it to be factored

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  1. anonymous
    • 5 years ago
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    and if possible show work so i know what either i was doing wrong or just wasnt doing at all

  2. anonymous
    • 5 years ago
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    Have you tried the quadratic formula?

  3. anonymous
    • 5 years ago
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    we are not allowed to use quadratic formula we havent even learned that yet im a freshmen they dont teach that til junior year

  4. anonymous
    • 5 years ago
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    what are the factors of 20?

  5. anonymous
    • 5 years ago
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    doesn't quadratic give complex roots anyway? I'm not sure there are integer solutions to this equation (but please prove me wrong...)

  6. amistre64
    • 5 years ago
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    complete the square; its the long hand version of the quad formula

  7. amistre64
    • 5 years ago
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    the quad doesnt 'give' complex roots, just shows when you got em :)

  8. anonymous
    • 5 years ago
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    Ug I dropped a (-) sign in my quad work ;)

  9. anonymous
    • 5 years ago
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    Yeah, it has two real distinct roots.

  10. anonymous
    • 5 years ago
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    so did the teacher make a mistake and theres really two prime trinomials

  11. anonymous
    • 5 years ago
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    no - I'm sorry, ignore me.

  12. anonymous
    • 5 years ago
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    It does not have integer solutions, but it has real solutions.

  13. anonymous
    • 5 years ago
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    no, What methods have you learned?

  14. amistre64
    • 5 years ago
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    lol..... cant ignore you ;)

  15. anonymous
    • 5 years ago
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    just foil and thats all and i cant find the solution at all ive been working on this one problem for over an hour now

  16. anonymous
    • 5 years ago
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    We need a delete option :P

  17. amistre64
    • 5 years ago
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    white out on the screen lol

  18. amistre64
    • 5 years ago
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    10d^2+17d-20 (d+ /10)(d- /10) 10(20) = 200 1,200; 2;100; 4;25; 5;40; 10; 20 ....doesnt seem to factor into integrers

  19. anonymous
    • 5 years ago
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    so are all those numbers the answer when its factored??

  20. amistre64
    • 5 years ago
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    4;50; 8;25 thats the one 25 and 8

  21. anonymous
    • 5 years ago
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    It can't be factored into integers.

  22. anonymous
    • 5 years ago
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    so then what is it factored because we havent learned how to do these when they cant be factored into integers

  23. amistre64
    • 5 years ago
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    (d+ /10)(d- /10) (d+ 25/10)(d- 8 /10) (d+ 5/2)(d- 4/5) (2d+5)(5d- 4)

  24. anonymous
    • 5 years ago
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    ok thank you

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