GEORGIA MATHEMATICS 1 - Carnegie Learning

Pre-Test PAGE 414. What x-values do you think will be zeroes of the given quadratic equation?Use complete sentences to explain your reasoning.y 1.25(x 2)(x 2)Sample Answer: The solutions are 2 and –2, because when x = 2, then (x – 2) = 0 andzero multiplied by any number is zero. Likewise, when x = –2, then (x + 2) = 0 and zeromultiplied by any number is zero.15. What x-values do you think will be solutions to the given quadratic equation?Write your solutions in radical form if necessary. Use a complete sentence in your answer.x 2 120Sample Answer: The solutions to the equation are 120 and 120 .316. Find the zeroes of the quadratic function by using the Quadratic Formula. Show all your work.y 6x 2 7x 2a 6, b 7, c 2x 772 4(6)(2)2(6)749 4812 7 112So, the solutions are x 7 1 6 and x 7 1 8 .12 12 1 212 12 2 317. What does the value of the discriminant tell you about the number of solutions to aquadratic equation? Use complete sentences in your answer.Sample Answer: When the discriminant is positive, there are two solutions. When thediscriminant is zero, there is one solution. When the discriminant is negative, there areno solutions.© 2008 Carnegie Learning, Inc.18. Suppose that a ball is thrown straight up into the air from a height of 5 feet at an initialvelocity of 15 feet per second. Write a quadratic function that models the height of theball in terms of time using the vertical motion model y 16t 2 vt h.y 16t 2 15t 5228 Chapter 3 ■ Assessments Georgia Mathematics 1