Respuesta :

2² - y - 5 = 0 

Evaluate the power.

4 - y - 5 = 0

Calculate the sum or difference.

-1 - y = 0

Move constant to the right side and change its sign. 

-y = 1

Change the signs on both sides of the equation.

y = -1


Answer: I do not know the answer for this one sorry