anonymous
  • anonymous
joe showed his work please explain what he did wrong. 2x^3-4x^2-48x 2x(x^2-2x-24) 2x (x+6)(x-4)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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jim_thompson5910
  • jim_thompson5910
do you see the error?
anonymous
  • anonymous
well i think when he factored out the gcf he messed up ?
jim_thompson5910
  • jim_thompson5910
no that part is correct

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anonymous
  • anonymous
hmm well hold on
anonymous
  • anonymous
nope i aint got it :(
jim_thompson5910
  • jim_thompson5910
the error happens when he factors x^2-2x-24 to get (x+6)(x-4) why is that wrong?
anonymous
  • anonymous
he didnt find the correct multiples to add up to 2x
jim_thompson5910
  • jim_thompson5910
it's not +2x, it's actually -2x
anonymous
  • anonymous
well then subtract to 2x
jim_thompson5910
  • jim_thompson5910
notice how +6 - 4 = +2 but we want -2
jim_thompson5910
  • jim_thompson5910
so we should have -6 + 4 = -2 meaning that x^2-2x-24 should factor to (x-6)(x+4)
anonymous
  • anonymous
ok i see whear this is going
jim_thompson5910
  • jim_thompson5910
that's good
anonymous
  • anonymous
tthank you
jim_thompson5910
  • jim_thompson5910
yw

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