anonymous
  • anonymous
How do I find the square root of 169?
Mathematics
schrodinger
  • schrodinger
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ParthKohli
  • ParthKohli
You can see and tell that it is \(\pm 13\)
Jamierox4ev3r
  • Jamierox4ev3r
just divide 169 by 13 because 13*13 equals 169.
Jack1
  • Jack1
for another way, look up "Newton-Raphson" method... long winded but will work out all square roots for you, eg sqrt 3, sqrt 168

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anonymous
  • anonymous
How would I find out that it's 13x13?
Jamierox4ev3r
  • Jamierox4ev3r
square roots are just something i memorize
anonymous
  • anonymous
Is that the only way? to memorize?
Jamierox4ev3r
  • Jamierox4ev3r
or there is also jack's way, but it is very long winded
anonymous
  • anonymous
:c
Jack1
  • Jack1
guesstimating you know 10^2 = 100, so must be bigger you know 15^5 = 225, so must be smaller, leaves a range of 4 possibilities
Hunus
  • Hunus
Also, you know that it must end with either a three or a seven. And since you know it has to be greater than 10 and less than 15 your only choice is 13
Jack1
  • Jack1
or you could get a pile of 169 rocks, and see how many even piles of the same number of rocks as piles you can split them in to...?
Jamierox4ev3r
  • Jamierox4ev3r
jack that would take a lot of time lol :)
AonZ
  • AonZ
type in calculator derp?
anonymous
  • anonymous
13

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