Answer:
Explanation:
-3 - (-15):
This simplifies to -3 + 15, which is 12. The sign is positive.
x(-x):
This is the product of a variable x and its negation (-x). The product of a number and its negative is always negative.
-5 - (-2)(-1):
First evaluate -2(-1), which is 2. Then, -5 - 2 results in -7. The sign is negative.
A negative number times two positive numbers:
The product of a negative number and two positive numbers is always negative.
So the signs are:
Positive
Negative
Negative
Negative