Precalculus 2014

 PAGE: 145 SET: Exercises PROBLEM: 1

The function is .

Let .

Therefore has real zeros at and .

Create a sign chart using these values.

Note : The solid circles denote that the values are included in the solution set.

Observe the sign chart :

The set of values of denoted in pink color represents the solution set.

Determine whether is positive or negative on the test intervals.

Test intervals are and .

If , then .

If , then .

If , then .

The solutions of are values for which is negative or equal to .

The solution is .

The solution set of is .

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