Answer:
-1
Explanation:
(8 + -9)(9 + -8)
A negative times a positive is a negative.
8 + -9
+- = -
8 - 9
8 - 9 = -1
(-1)(9 + -8)
9 + -8
+- = -
9 - 8
9 - 8 = 1
(-1)(1)
Now, we multiply
Remember, a negative times a positive equals a negative.
-1 * 1 = -1
Our answer is -1