1) x = 0
2) y + z = 0
I get that first one is sufficient, but how is the second one?
Is xy + xz = 0
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- Anurag@Gurome
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Question: Is xy + xz = 0?moatik wrote:1) x = 0
2) y + z = 0
I get that first one is sufficient, but how is the second one?
(1) x = 0 implies xy + xz = x(y + z) = 0(y + z) = 0
So, (1) is SUFFICIENT.
(2) y + z = 0 implies x(y + z) = x * 0 = 0
So, (2) is SUFFICIENT.
The correct answer is D.
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The question becomes much simpler if you simplify the question!moatik wrote:1) x = 0
2) y + z = 0
I get that first one is sufficient, but how is the second one?
Is xy + xz = 0?
Is x(y + z) = 0?
When will this be true? If x=0 or (y + z) = 0.
(1) x = 0... sufficient!
(2) y + z = 0... sufficient!
Each statement is sufficient alone - choose (D).
Stuart Kovinsky | Kaplan GMAT Faculty | Toronto
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