anonymous
  • anonymous
help
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
?
anonymous
  • anonymous
|dw:1434415978932:dw|
jim_thompson5910
  • jim_thompson5910
list out the factors of 20 1, 2, 4, 5, 10, 20 which factors are a perfect square?

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anonymous
  • anonymous
4
jim_thompson5910
  • jim_thompson5910
so we can say \[\Large \sqrt{20} = \sqrt{4*5}\] \[\Large \sqrt{20} = \sqrt{4}*\sqrt{5}\] \[\Large \sqrt{20} = 2*\sqrt{5}\]
anonymous
  • anonymous
ok
jim_thompson5910
  • jim_thompson5910
do you see where to go from here?
anonymous
  • anonymous
no lol
jim_thompson5910
  • jim_thompson5910
|dw:1434416325773:dw|
anonymous
  • anonymous
jim_thompson5910
  • jim_thompson5910
|dw:1434416345748:dw|
jim_thompson5910
  • jim_thompson5910
|dw:1434416363616:dw|
jim_thompson5910
  • jim_thompson5910
so after that, the next step is |dw:1434416395563:dw|
anonymous
  • anonymous
ohhh now i see
jim_thompson5910
  • jim_thompson5910
think of the sqrt(5) as a variable, like x and you'll combine like terms (in a way)

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