Saturday, May 9, 2015

Solve the inequality: SQRT (3x - 2)2

We have to solve sqrt ( 3x - 2)^2 <
5


=> (3x - 2)^2 <
25


Now (3x - 2)^2 can be less than 25 if 3x - 2 is less
than sqrt 5 or if 3x - 2 is greater than - sqrt 5


This
gives two inequalities


3x - 2 <
5


=> 3x <
7


=> x < 7/3


and
3x - 2 > -5


=> 3x >
-3


=> x >
-3/3


=> x >
-1


So we have -1 < x <
7/3

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