Respuesta :

Step-by-step explanation:

a. Product of sum and difference.

4x² - 1

b. Square of binomial.

4x² + 4x + 1

c. Square of binomial.

4x² - 4x + 1

d. Subtraction

4x² + 4x + 1 - (4x² - 4x + 1) = 8x

RELAXING NOICE
Relax