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What does this mean? |100|=

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    |x| is the absolute value function. It measures how far from zero x is, whether positive or negative.

    |x| = x if x >= 0
    That is, if x is not negative, |x| is just haw far away x is.

    |x| = -x if x<0
    So, if x is a negative value, |x| is still positive

    Similarly, |x-10| is how far away from 10 x is.

    So, |100| = 100
    |-3| = 3

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