• Qudratullah Danyar

The concept of differential is one of the essential parts of derivatives in advanced math and it is widely used in many general rules of nature including physics and chemistry. We can use differential to obtain the amount of the changes of a quantity compared to other specific quantity if these quantities are related together by a function. Using differentials, we can also perform some approximate calculations very easily. The purpose of the article is to explain the applications of factual double function differential in approximate calculations, which has more applications than factual single functions, and its differentials are more attractive and efficient. This article is a literature review, and every effort has been made to collect data from authentic references. The findings show that factual quadratic function differential in approximate calculations has many applications such as approximate calculation of areas of geometric shapes, construction of buildings, identifying the amount of acceptable errors in economic calculations in case of changes of dimensions of surfaces area and workload of buildings, and calculation of parameters of electric cycle in electric power.

Partial differential of factual quadratic function General differential factual quadratic function Sensitivity to change

"Application of Differential of Factual Quadratic Function in Approximate Calculations ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 2, page no.583-590, February-2020, Available :http://www.jetir.org/papers/JETIR2002086.pdf

"Application of Differential of Factual Quadratic Function in Approximate Calculations ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 2, page no. pp583-590, February-2020, Available at : http://www.jetir.org/papers/JETIR2002086.pdf