Question

What is the intermediate step in the form
(
x
+
a
)
=
b
(x+a)
2
=b as a result of completing the square for the following equation?
−
5
x
2
−
456
=
−5x
2
−456=
 
 
−
80
x
−
1
−80x−1

Answer 1

I dont know the answer

Answer 2

I think it is bedmas,  BEDMAS means braket exponents divide mutiply add subbtract.