Posted by Madison on Monday, August 30, 2010 at 2:52pm.
Solve each inequality algebraically.
|2x-1|-2<3 I don't understand how the answer is -2<x<3
- Math - MathMate, Monday, August 30, 2010 at 3:11pm
There are two important points involved:
1. When an inequality is multiplied or divided by a negative number on each side, the inequality changes direction.
2. When the absolute function comes into play, we have two conditions which have to be considered separately:
a. the contents of the absolute function is positive, and
b. the content of the absolute function is negative.
This means we double the number of conditions.
For example, to solve
a. x-1>4, => x>5, and
b. -(x-1) > 4, therefore
Apply the same way to the given inequation and you should arrive at
-2<x<3 as the answer.
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