Question 372385
{{{y=-x^2+6x+5 = -(x-9)^2+14}}}.  The domain is the set of all real numbers.  The range is ({{{-infinity}}}, 14].

{{{y=(1/2)(x-6)^2+7}}}. The domain is the set of all real numbers, the range is [7, {{{infinity}}}).

{{{y=-3(x+2)^2+1}}}. Domain is all  real numbers, range is ({{{-infinity}}}, 1].

{{{Y=4x^2-8x = 4(x^2-2x+1) - 4 = 4(x-1)^2 - 4}}}.  Domain is all real numbers. Range is  [-4, {{{infinity}}}).