anonymous
  • anonymous
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
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
and if possible show work so i know what either i was doing wrong or just wasnt doing at all
anonymous
  • anonymous
Have you tried the quadratic formula?
anonymous
  • anonymous
we are not allowed to use quadratic formula we havent even learned that yet im a freshmen they dont teach that til junior year

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More answers

anonymous
  • anonymous
what are the factors of 20?
anonymous
  • anonymous
doesn't quadratic give complex roots anyway? I'm not sure there are integer solutions to this equation (but please prove me wrong...)
amistre64
  • amistre64
complete the square; its the long hand version of the quad formula
amistre64
  • amistre64
the quad doesnt 'give' complex roots, just shows when you got em :)
anonymous
  • anonymous
Ug I dropped a (-) sign in my quad work ;)
anonymous
  • anonymous
Yeah, it has two real distinct roots.
anonymous
  • anonymous
so did the teacher make a mistake and theres really two prime trinomials
anonymous
  • anonymous
no - I'm sorry, ignore me.
anonymous
  • anonymous
It does not have integer solutions, but it has real solutions.
anonymous
  • anonymous
no, What methods have you learned?
amistre64
  • amistre64
lol..... cant ignore you ;)
anonymous
  • anonymous
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
anonymous
  • anonymous
We need a delete option :P
amistre64
  • amistre64
white out on the screen lol
amistre64
  • amistre64
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
anonymous
  • anonymous
so are all those numbers the answer when its factored??
amistre64
  • amistre64
4;50; 8;25 thats the one 25 and 8
anonymous
  • anonymous
It can't be factored into integers.
anonymous
  • anonymous
so then what is it factored because we havent learned how to do these when they cant be factored into integers
amistre64
  • amistre64
(d+ /10)(d- /10) (d+ 25/10)(d- 8 /10) (d+ 5/2)(d- 4/5) (2d+5)(5d- 4)
anonymous
  • anonymous
ok thank you

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