Respuesta :

dvclee2

Answer:

b² = 2bx - 2by

Step-by-step explanation:

2x + b = y + 2b

b = 2x - y

b² = (2x - y)²

b² = (2x - y)(2x - y)

b² = 4x² - 2xy - 2xy + y²

b² = 4x² - 4xy + y²