Question

What number would be added to both sides in order to complete the square when solvinghttp://media.education2020.com/evresources/2003-19-03-00-00_files/i0030000.jpg ?
A.
16
B.
18
C.
64
D.
81

Answer 1

The number that will be added to both side is the square of half the coeficient of x. i.e.
$(\frac{8}{2})^{2} = 4^{2} =16$