anonymous
  • anonymous
How do you factor x^2-4x+24
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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Mertsj
  • Mertsj
It won't factor by the usual methods since there are not 2 numbers whose product is 24 and whose sum is -4
anonymous
  • anonymous
can't be factored. use the quadratic formula which is x= -b + or - the square root of b^2 - 4ac all over 2a a= the x^2 which is 1 b=the -4 c=24 hope that helped :)
anonymous
  • anonymous
I don't know what to do, though.

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Mertsj
  • Mertsj
So if you want to factor it, you could use the quadratic formula and find the roots. Then using the roots, you could write the factors.
anonymous
  • anonymous
I think that helped
Mertsj
  • Mertsj
Are you sure you copied it right?
anonymous
  • anonymous
Yes
Mertsj
  • Mertsj
\[x=\frac{4\pm \sqrt{16-4(24)}}{2}=\frac{4\pm \sqrt{-80}}{2}=\frac{4\pm4\sqrt{5}i}{2}=2\pm2\sqrt{5}i\]
Mertsj
  • Mertsj
So the factors must by: \[[x-(2+2\sqrt{5}i)][x-(2-2\sqrt{5}i)]\]

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