calculusxy
  • calculusxy
MEDAL!!! What do I do when for a solution of a parabola I don't get a real number (like 1, 3) instead I get something like:
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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calculusxy
  • calculusxy
\(\huge \frac{2 \pm 2\sqrt{1} }{3}\)
anonymous
  • anonymous
\[\sqrt1=??\]
calculusxy
  • calculusxy
fine, we can replace this to be like 3. i am making this up

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anonymous
  • anonymous
oh ok it is a hypothetical question
calculusxy
  • calculusxy
\[\frac{2 \pm 2\sqrt{1} }{3}\]
anonymous
  • anonymous
you get what you get if the answer is \[\frac{2\pm\sqrt5}{2}\] then those are the two answers
anonymous
  • anonymous
most of the time you do not get a rational number
calculusxy
  • calculusxy
so if i don't get a rational number, then i will just have to leave it like that right?
anonymous
  • anonymous
yes
calculusxy
  • calculusxy
ok thank you.
anonymous
  • anonymous
you have a specific example?
calculusxy
  • calculusxy
another question.
anonymous
  • anonymous
kk
calculusxy
  • calculusxy
so if i have (hypothetical): \[\frac{ 4 \pm 8\sqrt{2} }{ 4 }\] then i can simplify it as: \[\frac{ 1 \pm \sqrt{3} }{ 1 }\] or just \(1 \pm \sqrt{3}\)
anonymous
  • anonymous
not quite
calculusxy
  • calculusxy
oh sorry i forgot to put the 2 in front of the square root
anonymous
  • anonymous
\[\frac{ 4 \pm 8\sqrt{2} }{ 4 }=\frac{4}{4}\pm\frac{8\sqrt2}{4}\]
anonymous
  • anonymous
so \[1\pm2\sqrt2\] it means you used the quadratic formula when you should have completed the square
anonymous
  • anonymous
you have the original equation ?
calculusxy
  • calculusxy
\[1 \pm 2\sqrt{2}\] no i just made a hypothetical question because i have a test on this topic (along with others) tmrw
anonymous
  • anonymous
oh ok
anonymous
  • anonymous
good luck with your exam
calculusxy
  • calculusxy
and but if i have: \[\frac{ 2 \pm 6\sqrt{5} }{ 3 }\] then i just leave it as it is?
anonymous
  • anonymous
yes
calculusxy
  • calculusxy
ok thank you so much!
anonymous
  • anonymous
i would
anonymous
  • anonymous
yw
Anaise
  • Anaise
......

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