Question

Select all expressions that are equivalent to 16x−12−24x+4. Show or explain your reasoning.

1. 16x - 12(1 + 2x) + 4

2. 40x - 16

3. 4 - 12 + (2x - 3x)

4. -8(x+1)

Answer 1

the correct one is 1. 16x - 12(1 + 2x) + 4

Explanation:

16x−12−24x+4 is equivalent to 8x-8

1. 16x - 12(1 + 2x) + 4 is equivalent to 8x-8

2. 40x-16 is equivalent to 8(5x−2)

3. 4 - 12 + (2x - 3x) is equivalent to −x−8

4. -8(x+1) is equivalent to −8x−8