Exercise 2: Concepts

1. 2(x + 4) = 2x 8
2. 2(x - 4) = 2x 8
3. -2(x + 4) = -2x  8
4. -2(-x - 4) = 2x 8

1. 4m + 6m = ( + )m = m
2. 30n² - 50n² = ( - )n² = n²
3. 12 + 32d + 15 = 32d +

Like terms can be combined by adding or subtracting the of the term and keeping the same with the same exponents.

-(x + 10) = -x  10