Respuesta :

DGBxBigxBrain

Answer:

4

Step-by-step explanation:

The form ax²+bx+c=d to find the number to add you do

(b/2)² so

(4/2)²=

4

jdd071644

Answer:

Step-by-step explanation:

to be honest I really don’t know necause the equation is actually solveable just the way it is