Vincen wrote:What is the value of p^3 - q^3?
(1) p - q = 0
(2) p + q = 0
Statement 1:
Thus, p=q.
Substituting p=q into p³ - q³, we get:
p³ - q³ = p³ - p³ = 0.
SUFFICIENT.
Statement 2:
If p=0 and q=0, then p³ - q³ = 0³ - 0³ = 0.
If p=1 and q=-1, then p³ - q³ = 1³ - (-1)³ = 1 +1 = 2.
Since p³ - q³ can be different values, INSUFFICIENT.
The correct answer is
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