ACT Math : Equations / Inequalities

Study concepts, example questions & explanations for ACT Math

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Example Questions

Example Question #311 : Equations / Inequalities

Solve:  

Possible Answers:

 and 

 and 

 and 

 and 

None of the other answers

Correct answer:

 and 

Explanation:

To solve, we must set it equal to zero. The above expression is of the form , so we can use the quadratic formula:

to solve for the roots which are  and

We can check by plugging the roots into the expression and making sure that it equals zero.

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