Paul Whisler


  1. It is because square root of any positive integer is greater than 0. So, the summation of the square root of two numbers can not be equal to 0.

  2. Hey Sal. I wanted to know which software and apparatus do u use for making these study Videos ?

  3. what the hell man answer is 8/5 try it..think u messed up something.

  4. why all videos from khan academy are mute but other videos work fine?!

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