Consider the following question and decide which statement is sufficient to answer the question.
Following
Find the value of p2 - q2.
Statement:
1) If p + q = 12
2) If pq = 4
1
Only 1 is sufficient.
2
Neither 1 nor 2 is sufficient.
3
Only 2 is sufficient.
4
Both 1 and 2 are sufficient.