Question

help! plz! What number must you add to complete the square?

x2 + 12x = 33

Answer 1

a complete square is of the form:

(x+n)^2

which expands to:

x^2 +2n x + n^2

we need to "add" n^2, therefore to determine "n" we use your given information

2n x = 12x

2n = 12

n = ? ; and therefore n^2=?