If we express 3x^2 - 18x + 12 in the form a(x - h)^2 + k, then what is a + h + k?
3 ( x^2 - 6x + 4) complete the square on x
3 ( x^2 - 6x + 9 + 4 - 9)
3 [ (x - 3)^2 - 5 ]
3 ( x - 3)^2 - 15
(a, h , k) = ( 3 , 3 , - 15)
a + h + k = -9
