buddhababy002
Can someone help me with this equation? I'm trying but it's not coming out right.



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buddhababy002
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Find an exact solution for
Then, find the approximate solution.

anonymous
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start by "cross multiplying" to get
\[2(\sqrt{5}1)=\sqrt{5}x\]

RyanL.
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\[x=\frac{2(\sqrt{5}1)}{\sqrt{5}}\]

anonymous
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\[2\sqrt{5}2=\sqrt{5}x\]
\[x=\frac{2\sqrt{5}2}{\sqrt{5}}\]

anonymous
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maybe you need to "rationalize the denominator" as well

RyanL.
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multiply and divide. You just have to keep track of things. It's better when you put parentheses on things when you do this.

buddhababy002
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okay, i'll try again..

buddhababy002
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I'm still getting an answer thats not on my choice list.. :/

nitz
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what are ur choices????

buddhababy002
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a. 102 sqrt5/5; 1.1
b. 22sqrt5; 2.5
c. 2; 2
d. 2sqrt52/sqrt5; 1.1

nitz
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ya its d

buddhababy002
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can you explain how you did and it got that answer please?

nitz
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see the first part of d has already been solved by satellite 73

nitz
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for 1.1,you can simply put the value of sqrt(5) and solve....

buddhababy002
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Oh i see.. lol ty