Complete the square: x^2+12x+9. Enter your answer in the form a(x+u)^2+v, where a, u, and v are replaced by numbers.
x^2 + 12x + 9
Take 1/2 of 12 = 6
Square this = 36
Add and subtract this
x^2 + 12x + 36 + 9 - 36 factor the first three terms, simplifythe rest
1(x + 6)^2 - 27
"a" is an understood 1
u = 6
v = -27
