The first part of the solution is easy as its a simple plus , minus. But the next part where it uses some functions is hard. Can you please explain it in a different way.

Who is Participating?
ThomasMcA2Connect With a Mentor Commented:
At the beginning of the problem, you were shown what the yield would be for 1 or 2 additional trees.

For 1 additional tree: Yield = (300 -1(10))  (20 + 1)
For 2: Yield = (300 -2(10))  (20 + 2)

What's different between those two? Only the values of 1 or 2. So for an unknown number of trees, replace the 1 or 2 with an X to get your formula:

Yield = (300 -X(10))  (20 + X)

Then transpose that to get:

Yield = (300 -10X)  (20 + X)

Note that 250 was used merely to simplify the formula. The author skipped a step, which is causing your confusion.

They started with this:

-10X^2 + 100X + 6000

And then both added and subtracted 250, for a net change of zero:

-10X^2 + 100X - 250 + 6000 + 250

And then simplified that into:

-10(X^2 - 10X + 25) + 6000 + 250
aburrConnect With a Mentor Commented:
If you are satisfied with the first panel of the solution, fine. It ends with
Yield = (300 -2(10) x (20 + 2)
What do the numbers mean? (explained in panel one).
 Note the 2. What is it?
It is the number of additional trees. You want to find the unknown number of additional trees wanted so call it x.
Replace the 2 with x. You get the equation at the start of panel 2. That equation is solved in the additional panels.
mustish1Author Commented:
I am not understanding that how it makes this function?

Then Yield =( 300 – 10x) (20 + x)=.......
A proven path to a career in data science

At Springboard, we know how to get you a job in data science. With Springboard’s Data Science Career Track, you’ll master data science  with a curriculum built by industry experts. You’ll work on real projects, and get 1-on-1 mentorship from a data scientist.

mustish1Author Commented:
ok I understand this part. How the graph made based on quadratic equation?
a= -10
b= 100
c= 6000
mustish1Author Commented:
Also next part where it says:  Complete the square to find the vertex of the parabola. Why not just use the quadratic function? How would I know to add 250 on both sides if i have similar question but different numbers.
mustish1Author Commented:
Yield = (300 -10X)  (20 + X)

can you please tell me how you get this equation
-10X^2 + 100X + 6000
mustish1Author Commented:
I still need more practice. Thank You.
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.