??????????????? vertex ??????????????????????
did yu put in all em unneeded ()'s just tu konfuze evreewon???????
me assume yu spozed tu sae...y=(1/4)*(x+2)^2-9
bi "vertex" me assume yu want min/max or lo/hi
dy/dx=(1/4)*(2x+4)...set it =0 tu find horizontal tangent=lo or hi
2x+4=0, x=-2
This is a zero...y=0 at x=-2 & slope=0 2
y=-9/4
lo point is (-2, -9/4)