Question 122841
This is the way you complete the square.
:
The rules is divide the coefficient of x by 2, then square that value
That give you the 3rd term in a perfect square:
:
x^2 + 8x + ____
:
In this problem the coefficient of x is 8
Divide by 2, results in 4
Square 4; results is 16
We have:
x^2 + 8x + 16
If you factor
(x+4)(x+4); FOIL this and you get the equation above, right?
or
(x+4)^2