Replace each equation with constants to complete the square and form a true equation

Question

x^2+2x+--=(x+---)^2

Answer 1

how to do this: first, from the equation, we get b or the numerical coefficient of x.
from the given, b = 2.
then divide this by 2:
2/2 = 1
and square it:
1^2 = 1
thus, the number that we're looking for is 1:
x^2 + 2x + 1 =(x + 1)^2

hope this helps~ :)