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MA
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what is the value of (a+b)^2? i. a+b=10 ii, 2ab=40 18 Feb 2005, 00:43
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what is the value of (a+b)^2?

i. a+b=10
ii, 2ab=40



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what is the value of (a+b)^2? i. a+b=10 ii, 2ab=40 18 Feb 2005, 01:05
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A)

...but i dont think that it is possible to get different result for the variables (regarding a and b) in the gmat !
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what is the value of (a+b)^2? i. a+b=10 ii, 2ab=40 18 Feb 2005, 04:26
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squaring both sides onf I we get 100

A
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what is the value of (a+b)^2? i. a+b=10 ii, 2ab=40 18 Feb 2005, 20:56
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A it is

1)
(a+b)^2=(10)^2=100...sufficient

2)
2ab=40, ab=20, a=20/b

(20/b + b)=(20+b^2)^2...u have one variable unknown...therefore insuff
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what is the value of (a+b)^2? i. a+b=10 ii, 2ab=40 18 Feb 2005, 21:15
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if we had squares of a and b, then D wud b the answer. But for now A is the answer
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what is the value of (a+b)^2? i. a+b=10 ii, 2ab=40 18 Feb 2005, 22:38
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Sorry guys, i have posted wrongly. it should be like this

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

i. a^2+b^2=10
ii. 2ab = 40
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what is the value of (a+b)^2? i. a+b=10 ii, 2ab=40 18 Feb 2005, 22:55
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I will jump into the trap :P answer C

Statement 1 :
There is no information that A or B have to be integers. No way to find the result because we don't know the value of ab to find 2ab

Statement 2 :
No clue, we know that ab=20, it can be many different values.

Statement 1 & 2 together :
a^2+b^2+2ab = 10 + 40 = 50

C for me even if it's like a enormous tap :-D I think that the big thing is that it is not specified that a and b have to be integers...so it can be many values...
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what is the value of (a+b)^2? i. a+b=10 ii, 2ab=40 18 Feb 2005, 23:02
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No Arsene I think the answer is C

(a+b)^2 = a^2+2ab+b^2 and only through C do you get both values...I think your fine...sometimes ETS likes to play reverse psychology...watch me be wrong :oops:



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