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square roots can be positive or negative, correct ?
bindhaas
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Post Posted: Sun Dec 09, 2007 8:15 pm Reply with quote
what's the answer for following DS
If m and v are integers, what is the value of m + v?

(1) mv = 6

(2) (m + v)^2 = 25

mine is E.
vts_gmat
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Post Posted: Sun Dec 09, 2007 9:41 pm Reply with quote
mine too is "E"
Statement 1: m*v=6
implies: (+m)(+v)=+6 or (-m)(-v)=+6
statement 2: m+v=+/-5
implies: m=+/-3 or 2 & v=+/-2 or 3
Both together can not give correct answer, Hence, "E"
Stacey Koprince
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Joined: 06 Mar 2007
Posts: 2644
Location: San Francisco
Post Posted: Mon Dec 10, 2007 7:52 pm Reply with quote
Please cite the source of the question; instructors cannot answer until we know the source.
square roots can be positive or negative, correct ?
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