GMAT Math : Solving equations

Study concepts, example questions & explanations for GMAT Math

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Example Questions

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Example Question #71 : Solving Equations

Express  in terms of .

Possible Answers:

Correct answer:

Explanation:

 

 

 By two substitutions:

Example Question #71 : Equations

Which of the following is the solution set of the equation:

Possible Answers:

Correct answer:

Explanation:

Square both sides of the equation, then solve the resulting quadratic equation by factoring:

Either 

or 

Checking both solutions, however:

This eliminates 0 as a solution.

8 turns out to be the only solution.

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