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Manipulating an inequality

  1. Nov 19, 2011 #1
    In an example in my textbook, it says the following:

    "If -1 ≤ x ≤ 1, then 0 ≤ x2 ≤ 1. "


    Can someone explain to me how to move from the first statement to the second statement please? I'm not quite sure how the -1 turned into a 0...
     
  2. jcsd
  3. Nov 19, 2011 #2

    Dick

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    Did you draw a graph of x^2 on the interval -1 ≤ x ≤ 1?
     
  4. Nov 19, 2011 #3
    Ah right... it's staring me right in the face! So clear that I missed it haha. Thank you!
     
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