What is the value of (x - y)(x + y) if x = 10 and y = 15?
(x-y)(x+y) = (10-15)(10+15) = (-5)(25) = -125.
Complete the following task based on the instruction and optional input provided.### Instruction:
What is the value of (x - y)(x + y) if x = 10 and y = 15?

### Output:
(x-y)(x+y) = (10-15)(10+15) = (-5)(25) = -125.