What is the x and the y in x+y=2 what is the slope

Place the following steps in order to complete the square and solve the quadratic equation,

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant.given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.

Why is studying fractions important