What is the value of |x| ?
(1) x = |x|
(2) x^2 = 9
[spoiler]Source: grockit[/spoiler]
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diebeatsthegmat
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from statement 2. x^2=9 so x =+/-3....insufficientselango wrote:What is the value of |x| ?
(1) x = |x|
(2) x^2 = 9
[spoiler]Source: grockit[/spoiler]
statement x=|x| thus x must be positive since |3|=3 and = 3 but |-3|=3#-3 insufficient
from 1+2 so x =3
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Testluv
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(1) is clearly insufficient as there is no value. Eliminate A and D.
(2) tells us that x is 3 or -3. The absolute value of both of these numbers is 3. Thus, (2) is sufficient by itself.
The answer is B.
(2) tells us that x is 3 or -3. The absolute value of both of these numbers is 3. Thus, (2) is sufficient by itself.
The answer is B.
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diebeatsthegmat
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ohh yeah, i forgot that it just wanted to know what \X\ is, not what x is....Testluv wrote:(1) is clearly insufficient as there is no value. Eliminate A and D.
(2) tells us that x is 3 or -3. The absolute value of both of these numbers is 3. Thus, (2) is sufficient by itself.
The answer is B.
thanks
