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What is the value of (a+b)^2?

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What is the value of (a+b)^2? [#permalink] New post 24 Dec 2012, 18:59
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85% (01:20) correct 14% (00:00) wrong based on 7 sessions
What is the value of (a+b)^2?

(1) ab = 0
(2) (a-b)^2 = 36
[Reveal] Spoiler: OA

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Re: What is the value of (a+b)^2? [#permalink] New post 25 Dec 2012, 05:02
megafan wrote:
What is the value of (a+b)^2?

(1) ab = 0
(2) (a-b)^2 = 36


Each statement alone is clearly insufficient. When we take the statements together we have: ab=0 and a^2-2ab+b^2=36, thus a^2+b^2=36 --> (a+b)^2=a^2+2ab+b^2=36+0=36. Sufficient.

Answer: C.
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Re: What is the value of (a+b)^2?   [#permalink] 25 Dec 2012, 05:02
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