What is the intermediate step in the form (x+a)^2 = b as a result of x^2-16x= -68

Two different linear functions are shown below with two points given from each function. use slope-intercept form or point-slope form to find the equation of each. linear function a points: (–5, –2), (–5, 7) linear function b points: (7, –5), (–2, –5) function a has: the equation of line a is: function b has: the equation of line b is:

Math it's appreciated. (picture provided)

Find the solution(s) to x^2-14+49=0