Answer: -8r + 12
============================================
Step-by-step explanation:
The outer term -2 is multiplied by each term inside
- -2 times 4r = -8r
- -2 times -6 = 12
Then those results are added to get -8r + 12 as our final answer. We cannot combine these terms because they are not like terms.
I used the distribution property, also known as the distributive property.
That says a*(b-c) = a*b - a*c
In this case, a = -2, b = 4r, and c = 6.