Is x^2+x>-y^2?
(1) x^2+y^2=1
(2) x>0
inqeualities ds
This topic has expert replies
ya how did you conclude that?
What if x = -0.1...then x^2 = 0.01
therefore: x^2 + x = 0.01-0.1 = -0.09
If: y=0.4, y^2 = 0.16..therefore: -(y^2) = -0.16
Therefore: x^2+x > -(y^2)
Anyway IMO:
Answer is B
What if x = -0.1...then x^2 = 0.01
therefore: x^2 + x = 0.01-0.1 = -0.09
If: y=0.4, y^2 = 0.16..therefore: -(y^2) = -0.16
Therefore: x^2+x > -(y^2)
Anyway IMO:
Answer is B
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x^2+x>-y^2 <=> x^2 + y^2 + x > 0?
(1) x^2+y^2=1
INSUFF, with x = -1, y = 0, the equation is exactly 0
(2) x>0
SUFF
(B)
(1) x^2+y^2=1
INSUFF, with x = -1, y = 0, the equation is exactly 0
(2) x>0
SUFF
(B)