Answer:
197.34
Step-by-step explanation:
In algebraic expressions, sign notation is an important element. Below are some notations that should be engaged;
- × - = +
- × + = -
+ × + = +
- × + = -
As such, to find -xy where x = -75.9 and y = 2.6
-xy = -(-75.9) × 2.6 (since - × - = +)
= 75.9 × 2.6
= 197.34
