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avatar+579 

How di I turn a decimal like -4.646 into a number like -2 - sqrt(7)

 Nov 2, 2017
 #1
avatar+128475 
+3

Notice that 

 

-2 - √ 7  is an irrational number  [ can't be expressed as a fraction]

 

But    -4.646   is rational   [ can be expressed as a fraction ]

 

So......it's impossible to turn a rational into an irrational  -  and vice-versa......

 

 

cool cool cool

 Nov 2, 2017
 #2
avatar+579 
+2

well i had 4.646 rounded...desmos doesn't go very deep into decimals for me XD

 #3
avatar+128475 
+1

Were you trying to solve an equation,OBT????

 

If so...post the problem and we'll see if we can solve it

 

cool cool cool

 Nov 2, 2017
 #4
avatar+579 
+1

i figured it out, don't trust desmos XD

 

thanks anyway! i have no idea how many of my questions you have answered, but it is definitely a lot!


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