X=2/5 y
please help!!

x = 2y/5

Step-by-step explanation:

Combine 2/5 and y.

Function has relative maximum  at point (-3,19) and relative minimum at (1,-13)

Step-by-step explanation:

We are given that

Differentiate w.r.t x

Substitute x=-3 then we get

Now we check for x<-3 -3<x<1 and x>1

For x<-3

Substitute x=-4

f'(x)>0

Function is increasing

For -3<x<1

Substitute x=0

f'(0)=-9<0

Function is decreasing for -3<x<1

x>1

Substitute x=2

f'(2)=

Function is increasing

When sign of function changes from negative to positive then function has relative minimum.

When the sign of function changes from positive to negative then function has relative maximum .

Substitute x=1

f(1)=

Substitute x=-3

f(-3)=

Therefore, function has relative maximum  at point (-3,19) and relative minimum at (1,-13)