Mathematics Pre-calculus 11 Unit 4 Self-Assessment 9. Two numbers have a sum of 20. If the sum of their squares is a minimum, find the numbers. Complete the square to find the minimum. F-Assessment No Attempt = 0 Beginning = 1 Emerging = 2 Developing = 3 Proficient = 4 Ex 10. A rectangular piece of land, bounded on one side by a river, is to be fenced on the other three sides. What is the largest possible area that can be enclosed by 300 metres of fencing? _ Complete the square to find the maximum area. slomox] B = Joloflois | = anigoloved Emerging = 2 Developing = 3 Proficient