Perform the operation
-3+(-9)
-3+(-9) is equal to -12.
To perform the operation -3 + (-9), you need to add the two numbers together.
-3 + (-9)
=(-3) + (-9)
To add two negative numbers, you can simply add their absolute values and keep the negative sign.
=(-3 - 9)
=-12
Therefore, -3 + (-9) = -12.