Mathematics
Grade10
Easy

Question

For a given function r(x) = |x - 1| - |x + 1| , evaluate r(-3)

  1. -2
  2. 2
  3. 6
  4. -6

Hint:

substitute the value in the equation

The correct answer is: 2


    given the equation; r(x) = |x - 1| - |x + 1|
    now substitute the value 3 in the equation
    r(-3) = |-3 - 1| - |-3 + 1| = |-4| - |-2| = 4 - 2 = 2

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