Answer:
-786000
Explanation:
Use PEMDAS. Multiplication comes first and when deciding which multiplication to use go from left to right. First you multiply 1455 by -786, then you multiply 455 by 786. Then you get two values: -1143630 and 357630 which you add together.
1455 x -786 + 455 x 786:
1455 x -786 = -1143630
455 x 786 = 357630
-1143630 + 357630 = -786000