Given: x (x – p) – y (y + p) = 7p
x2 - xp + y2 - yp = 7p
x2 - y2 - p(x+y) = 7p
(x+y)(x-y) - p(x+y) = 7p
(x-y) = \(\frac{p + 7p}{(x+y)}\)
Hence, option E is the correct answer.
Note: The answer cannot be determined as it is not in the options. None of the above is selected.
A | B | C | D | Average |
---|---|---|---|---|
3 | 4 | 4 | ? | 4 |
3 | ? | 5 | ? | 4 |
? | 3 | 3 | ? | 4 |
? | ? | ? | ? | 4.25 |
4 | 4 | 4 | 4.25 |