Big Ideas Math Integrated I, 2016
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Big Ideas Math Integrated I, 2016 View details
4. Solving Absolute Value Equations
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Exercise 55 Page 34

How does the sign of p affect the number of solutions?

Sometimes

Practice makes perfect

We are given the following absolute value equation. |x-4|=p In this equation, the number of solutions depends on the sign of p.

  • If p is a negative number there are no solutions to this equation, as the absolute value of any number is always greater than or equal to 0.
  • If p is 0, there will be one solution.
  • If p is a positive number there will be two solutions, as x-4 can equal either p or - p.

Given all of the above information we can write a conclusion.

For any real number p, the equation |x-4|=p will sometimes have two solutions.