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Standard : 11

BASIC ALGEBRA

 

 

Absolute value describes the distance of a number on the number line from 0 without considering which direction from 0 the number lies. The absolute value of a number is never negative. 

 

Example:

 

            The absolute value of -9 is 9

            The absolute value of 3 is 3

            The absolute value of 0 is 0

            The absolute value of -156 is 156

 

Example 2: Solve |2x − 17| = 3 for x.
Solution:
|2x − 17| = 3. Then, we have 2x − 17 = ±3 which implies x = 10 or x = 7.