Write the expression in standard form. (6f-5++3)

(6f-5+3g)-(-6g+3) = 6f-5+3g-(-6g)-3) = 6f-8+3g+6g = 6f+9g-8.

The vertex for  would represent a minimum because the coefficient of the binomial (x+1) squared term is positive (understood to be in front of the parenthesis). Think about the Vertex Form:  where "" is the coefficient of the binomial and (h, k) is the vertex. If "" is positive the parabola opens up ∪ (making the vertex the lowest point of the graph).  If "" is negative the parabola opens down ∩  (making the vertex the highest point of the graph).
Therefore:
The vertex of f(x) is a MINIMUM because .
The vertex of g(x) is a MAXIMUM because