This is the diagram of a rectangular yard with a square garden in one corner. The equation that represents the area of the yard is x^2 + 20x + 75 = 171, where x represents the length and width of the square garden in the corner. What will the garden's width be?

What is the value of x? enter your answer in the box. (cm)

‼️‼️‼️10 points‼️‼️‼️ me it’s important‼️‼️‼️‼️‼️

Mrs. avila is buying a wallpaper border to go on all of her kitchen walls. she wants to buy 5 extra feet of wallpaper border than she needs to be sure she has enough. she buys 55.5 feet of the border. the store owner selling the border uses the width of mrs. avila's kitchen to determine that the length of her kitchen must be 14.5 feet.