I wanted to understand the difference between X^2 =Y vs x = SQRT(Y),
eg: say x^2 = 36, x can be a +ve 6 or a -ve 6. But if X = SQRT(36), then x = 6 since I beleive that given a SQRT of a number, we can only take positive values. Am I right in making that statement.
In that regard, my question is, if I see a DS question asking for value of x, and if the statements are;
1) x^2 = 36;
2)x = SQRT(36)
Can I safely say, B is SUFFICIENT?
In the same regard, an other flavour of the question is,
Is the value of x + y = 0?
1) xy < 0
2)x^2 = y^2
I appreciate your response.
eg: say x^2 = 36, x can be a +ve 6 or a -ve 6. But if X = SQRT(36), then x = 6 since I beleive that given a SQRT of a number, we can only take positive values. Am I right in making that statement.
In that regard, my question is, if I see a DS question asking for value of x, and if the statements are;
1) x^2 = 36;
2)x = SQRT(36)
Can I safely say, B is SUFFICIENT?
In the same regard, an other flavour of the question is,
Is the value of x + y = 0?
1) xy < 0
2)x^2 = y^2
I appreciate your response.
Last edited by ildude02 on Mon Jun 23, 2008 8:38 pm, edited 1 time in total.
