What is the value of

[Vincen]

What is the value of \((a−c)^2?\)

(1) \(ac=1\)
(2) \((a+c)^2=26\)

[spoiler]OA=C[/spoiler]

Source: Veritas Prep

[Jay@ManhattanReview]

What is the value of \((a−c)^2?\)

(1) \(ac=1\)
(2) \((a+c)^2=26\)

[spoiler]OA=C[/spoiler]

Source: Veritas Prep

Each statement alone is insufficient for with taking each statement alone, there can be many possible values of \((a−c)^2.\)

(1) and (2) together

\((a−c)^2\) can be written as \((a+c)^2-2ac\)

Or, \((a−c)^2=(a+c)^2-2ac=26-2*1=24.\) Sufficient.

Correct answer: C

Hope this helps!

-Jay
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