Respuesta :

Answer:

b = a² + 2a

Step-by-step explanation:

Given

a + 1 = [tex]\sqrt{b+1}[/tex] ← square both sides

(a + 1)² = b + 1 ← expand the left side

a² + 2a + 1 = b + 1 ( subtract 1 from both sides )

a² + 2a = b