Match each of the following with its correct simplified solution

1. ab (a + b)

2. (a + b) (2a + 2b)

3. (a + b) 2

4. (a + b) (a - b)

a. a2 - b2

b. 2a2 + 4ab + 2b2

c. a2 + 2ab + b2

d. a2b + ab2

1. ab (a + b)

a^2b + a^2

answer is d. a2b + ab2

2. (a + b) (2a + 2b)

2a^2 + 2ab + 2ab + 2b^2

2a^2 + 4ab + 2b^2

answer is b. 2a2 + 4ab + 2b2

3. (a + b) 2

=a^2 + 2ab + b^2

answer is c. a2 + 2ab + b2

4. (a + b) (a - b)

= a^2 - b^2

answer is a. a2 - b2