Which value(s) of x are solution(s) of the equation below

You are remodeling your kitchen. you’ve contacted two tiling companies who gladly told you how long it took their workers to tile of a similar size jim completed half the floor in 8 hours. pete completed half of the other floor in 7 hours. if pete can lay 20 more tiles per hour than jim, at what rate can jim lay tiles

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

What multiplys to be 1 but adds up to be 4