Find the relative minimum value for the function: f(x,y) = e(5x2+8y2+4).  those 2's are "squares"

Please try to answer in 30 minute

Find the maximum and minimum values of the function f(x, y) = 2x² + 3y² - 4x-5 on the domain 2 + y² 256. The maximum value of f(x,y) is: List the point(s) where the function attains its maximum as an ordered pair, such as (-6,3), or a list of ordered pairs if there is more than one point, such as (1,3), (-4,7). The minimum value of f(x, y) is: List points where the function attains its minimum as an ordered pair, such as (-6,3), or a list of ordered pairs if there is more than one point, such as (1,3), (-4,7).

Let h(z) = -2z 2 + 12z + 3. Complete the square and find the maximum value of h.