anonymous
  • anonymous
Can someone help me with this equation? I'm trying but it's not coming out right.
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Find an exact solution for Then, find the approximate solution.
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anonymous
  • anonymous
start by "cross multiplying" to get \[2(\sqrt{5}-1)=\sqrt{5}x\]
anonymous
  • anonymous
\[x=\frac{2(\sqrt{5}-1)}{\sqrt{5}}\]

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anonymous
  • anonymous
\[2\sqrt{5}-2=\sqrt{5}x\] \[x=\frac{2\sqrt{5}-2}{\sqrt{5}}\]
anonymous
  • anonymous
maybe you need to "rationalize the denominator" as well
anonymous
  • anonymous
multiply and divide. You just have to keep track of things. It's better when you put parentheses on things when you do this.
anonymous
  • anonymous
okay, i'll try again..
anonymous
  • anonymous
I'm still getting an answer thats not on my choice list.. :/
anonymous
  • anonymous
what are ur choices????
anonymous
  • anonymous
a. 10-2 sqrt5/5; 1.1 b. 2-2sqrt5; -2.5 c. -2; 2 d. 2sqrt5-2/sqrt5; 1.1
anonymous
  • anonymous
ya its d
anonymous
  • anonymous
can you explain how you did and it got that answer please?
anonymous
  • anonymous
see the first part of d has already been solved by satellite 73
anonymous
  • anonymous
for 1.1,you can simply put the value of sqrt(5) and solve....
anonymous
  • anonymous
Oh i see.. lol ty

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