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Mathematics
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OpenStudy (firejay5):
Find the value of x. Leave your answer in simplest radical form. Picture will be drawn so be patient. Medal will be rewarded if work is shown or you explain how to do it.
12 years ago
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OpenStudy (firejay5):
|dw:1391916974186:dw|
12 years ago
OpenStudy (firejay5):
@jim_thompson5910 I need help with the work being shown
12 years ago
jimthompson5910 (jim_thompson5910):
a^2 + b^2 = c^2 ... pythagorean theorem
x^2 + x^2 = 6^2
2x^2 = 36
x = ???
12 years ago
jimthompson5910 (jim_thompson5910):
good
12 years ago
OpenStudy (firejay5):
Well wait what's after 2x^2 = 36 in order to get 3*sqrt 2
12 years ago
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jimthompson5910 (jim_thompson5910):
how did you get 3*sqrt(2)?
12 years ago
OpenStudy (firejay5):
Wolramalpha.com
12 years ago
jimthompson5910 (jim_thompson5910):
you need to divide both sides by 2
then take the square root of both sides
then simplify
12 years ago
OpenStudy (firejay5):
\[x = \frac{ \sqrt{36} }{ \sqrt{2} }\]
Is that right?
12 years ago
jimthompson5910 (jim_thompson5910):
keep going
12 years ago
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OpenStudy (firejay5):
x = 6/ sqrt 2 then what
12 years ago
jimthompson5910 (jim_thompson5910):
rationalize the denominator
12 years ago
OpenStudy (firejay5):
how do I rationalize it
12 years ago
jimthompson5910 (jim_thompson5910):
multiply top and bottom by sqrt(2)
12 years ago
OpenStudy (firejay5):
x = 6*sqrt 2
12 years ago
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jimthompson5910 (jim_thompson5910):
that's what you get in the numerator
12 years ago
OpenStudy (firejay5):
what's in the denominator 2
12 years ago
OpenStudy (firejay5):
x = \[x =\frac{ 6 \sqrt 2 }{ 2 }\]
12 years ago
jimthompson5910 (jim_thompson5910):
yep, then you reduce
12 years ago
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