Find the lengths of the sides of each right triangle. Use the Pythagorean theorem, and solve by completing the square. 63) x 10, 24, 26 x 2 x 64) x x 9 8, 15, 17 x 2 60) The area of a rectangular sign is 220 ft2. Its width is 9 ft less than its length. What are the dimensions of the sign? width 11 ft, length 20 ft 61) The area of a triangle is 60 cm2. Its base is 1 cm less than twice its height. Find the lengths of the base and the height. base 15 cm, height 8 cm 62) The length of the base of a triangle is 5 in. more than twice its height. Find the lengths of the base and the height if the area is 26 in2. base 13 in., height 4 in. R1) Discuss any new patterns you noticed as you completed the exercises. R2) How did they help you move through the exercises more quickly? R3) Were there any problems you could not do? If so, write them down or circle them, then ask your instructor in class. 10.3 Solving Quadratic Equations Using the Quadratic Formula What are your objectives for Section 10.3? How can you accomplish each objective? 1 Derive the Quadratic Formula • Follow the steps taken to derive the Quadratic Formula. • Derive the quadratic formula in your notes by using the steps learned to complete the square. • Understand and memorize the quadratic formula. 2 Solve a Quadratic Equation Using the Quadratic Formula • Complete the given examples on your own. • Complete You Trys 1–3. Read the explanations, follow the examples, take notes, and complete the You Trys. 620 CHAPTER 10 Quadratic Equations www.mhhe.com/messersmith
messersmith_power_introductory_algebra_1e_ch4_7_10
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