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What is the value of

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What is the value of

by Vincen » Fri Jun 19, 2020 3:01 am

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What is the value of \((a−c)^2?\)

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

[spoiler]OA=C[/spoiler]

Source: Veritas Prep
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Source: — Data Sufficiency |

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Re: What is the value of

by Jay@ManhattanReview » Fri Jun 19, 2020 4:44 am

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Vincen wrote: ↑
Fri Jun 19, 2020 3:01 am
 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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