T(z)= sin^2(z/4), {-3 ≤ z ≤ 8} identify the intervals where:
a) T(z) is increasing
b)T(z) is decreasing
C)T(z) is concave up
d)T(z) is concave down
Then identify the
e) absolute minimum and where it is
f) A relative maximum ( not absolute maximum and where it is

please help

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

i think it would be 42cm