Bunuel wrote:
If p + q = 3 and p – q = 17, then pq =
A. -70
B. -60
C. 0
D. 10
E. 70
Adding the equations together, we have:
2p = 20
p = 10
So, q is:
10 + q = 3
q = -7
Thus, pq is -70.
Answer: A
If p + q = 3 and p – q = 17, then pq =
A. -70
B. -60
C. 0
D. 10
E. 70
Adding the equations together, we have:
2p = 20
p = 10
So, q is:
10 + q = 3
q = -7
Thus, pq is -70.
Answer: A
