Respuesta :

Answer: B)subtract 5

(x-5)^2-25

Step-by-step explanation:

2a=-10

Divide both sides by 2

2a/2=-10/2

Simplify

a=-5

Add and subtract

x^2-10x+(-5)^2-(-5)^2

Complete the square

(x-5)^2-(-5)^2

Simplify;

(x-5)^2-25

Answered by one other than the ONE & Only #QUEEN herself aka #DRIPPQUEENMO!!

HOPE THIS HELPED!!