Question

don completes the square for the function y=x^2+6x+3. which of the following function reveals the vertex of the parabola?

Answer 1

x^2+6x+3=y
x^2+6x+9=-3+9
(x+3)^2=6
(-6/2)=-3
(-3)^2+6(-3)+9=6
9-18+9=6
y=-6