Step-by-step explanation:
Derivative of the first function:
set that equal to 0 and solve for possible x values.
put x back in to original equation to get a y value
y = 2, -160, -160,
Absolute min at (-3, -160) and (3, 160) and an absolute max at (0,2)
Second Part
Find derivative of
set equal to zero, it is a quadratic so you can use the quadratic formula to solve for x
x= -5 or -5/3
put x back into the original function to get a y value
y = 1 or -973/27
so absolute max at (-5, 1) and absolute min at (-5/3, -973/27)