Question

x^2 = -4x + 5, Quadratic problem, completing the square.

Answer 1

x^2+4x - 5=0
add and subtract square of half of the coefficient of x
i.e (4/2)^2 = 4
So
x^2 + 4x +4 -4 -5 = 0
(x^2 + 4x +2^2) -4 -5 = 0
you know a^2 + 2ab + b^2 = (a+b)^2
a = x and b = 2
we have
(x+2)^2 -9 = 0

Answer 2

Ohhh okay, I was struggling to put the 4x - 5 to the other side, one question what is the i.e stand for?

Answer 3

i.e stands for "that is"

Answer 4

okay thank you :D