Question

Which expression is equivalent to 2(a + 2b) - a - 2b? A. 3a + 2b B. 3a - 2b C. a - 2b D. a + 2b

Answer 1

D. a + 2b

Explanation:

2(a + 2b) - a - 2b

Expand brackets.

2a + 4b - a - 2b

Combine like terms.

2a - a + 4b - 2b

a + 2b

Answer 2

a +2b

Explanation:

2(a + 2b) - a - 2b

Distribute

2a +4b -a -2b

Combine like terms

2a -a + 4b-2b

a +2b