Find two numbers whose difference is 180 and whose product is a minimum

Let the numbers are x and y

And it is given that the difference is 180

So we have

And let the product is p. So we have

Substituting the value of x , we will get

Differentiating p,

Again differentiating ,

SO we will get minimum.

And to find the minimum, we have to set p' equal to 0 and solve for y.

Back substituting the value of y, we will get

So the numbers are 90 and -90 .

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.

it is x equals 3   plese mark me really need it

step-by-step explanation: