anonymous
  • anonymous
i really need some help
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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hartnn
  • hartnn
on which topic ?
anonymous
  • anonymous
quadratic equations
anonymous
  • anonymous

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hartnn
  • hartnn
yes, i can help. post your question.
anonymous
  • anonymous
i did up to 55sqrtof -55^2-4(24)(-24) all over 48
anonymous
  • anonymous
which is 55 + or - sqrt of 721 all over 48
anonymous
  • anonymous
then i got stuck, i know i have to factor right?
hartnn
  • hartnn
u have used quadratic formula to find roots, when it was asked to factor. if u only want an answer it doesn't matter what u use , factoring or formula...so do u want an answer or do u want to learn factoring?
anonymous
  • anonymous
i want to learn
hartnn
  • hartnn
ok, so u got quadratic equation as 24p^2 -55 p -24 = 0 right ? now tell me 2 numbers whose product is -24*24 = -576 and sum is -55
anonymous
  • anonymous
that's the part that i hate, because it takes so long to find the numbers. there's no easy way to find them? or a trick
anonymous
  • anonymous
-64 and 9
hartnn
  • hartnn
thats correct :) so u write your equation as 24p^2 -64p +9p -24 = 0 ok ? now what can u take out common from 1st 2 terms ??
anonymous
  • anonymous
p?
hartnn
  • hartnn
p and ? what can u take common from 24 and 64 ?
anonymous
  • anonymous
4
hartnn
  • hartnn
nice try .... what about 8 ?
anonymous
  • anonymous
yeah
anonymous
  • anonymous
and then the other one is 3(3p-8)
hartnn
  • hartnn
so u take 8p common 8p(3p-8) + 3 (3p-8) = 0 got this ? yes, other part is correct
anonymous
  • anonymous
which gives you (8p+3)(3p-8)
hartnn
  • hartnn
excellent, u are good at this :)
anonymous
  • anonymous
lol yeah right
hartnn
  • hartnn
so your roots are ?
hartnn
  • hartnn
8p+3 = 0 or 3p-8 = 0 u know what to do next?
anonymous
  • anonymous
ok so -3/8 and 8/3?
hartnn
  • hartnn
exactly :)
anonymous
  • anonymous
thank you!
hartnn
  • hartnn
welcome :) u did most part of the problem...
anonymous
  • anonymous
uh is there something i have to do after that? because it says its wrong
anonymous
  • anonymous
multiply?
hartnn
  • hartnn
did u write it like this ? \(\huge{\frac{-3}{8},\frac{8}{3}}\) no,don't multiply...
hartnn
  • hartnn
@eli123 ,did u get it right ?
anonymous
  • anonymous
i got it :) i had put the negative sign in front of the whole fraction :/ my bad @hartnn

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