In your own words, explain how to use the Square Root Property to solve the quadratic equation ( x + 2 ) 2 = 16 ( x + 2 ) 2 = 16. We earlier defined the square root of a number in this way: So, every positive number has two square roots-one positive and one negative. Therefore, both 13 and −13 are square roots of 169. Previously we learned that since 169 is the square of 13, we can also say that 13 is a square root of 169. īut what happens when we have an equation like x 2 = 7? Since 7 is not a perfect square, we cannot solve the equation by factoring. In each case, we would get two solutions, x = 4, x = −4 x = 4, x = −4 and x = 5, x = −5. ![]() We can easily use factoring to find the solutions of similar equations, like x 2 = 16 and x 2 = 25, because 16 and 25 are perfect squares. Textbook content produced by OpenStax is licensed under a Creative Commons Attribution License. We recommend using aĪuthors: Lynn Marecek, MaryAnne Anthony-Smith, Andrea Honeycutt Mathis Use the information below to generate a citation. Then you must include on every digital page view the following attribution: If you are redistributing all or part of this book in a digital format, Then you must include on every physical page the following attribution: If you are redistributing all or part of this book in a print format, Want to cite, share, or modify this book? This book uses the This book may not be used in the training of large language models or otherwise be ingested into large language models or generative AI offerings without OpenStax's permission. The sides of the deck are 8, 15, and 17 feet. Since x is a side of the triangle, x = −8 x = −8 does not Since this is a right triangle we can use the We are looking for the lengths of the sides Use the formula for the area of a rectangle. The area of the rectangular garden is 15 square feet. Restate the important information in a sentence. In problems involving geometric figures, a sketch can help you visualize the situation. Both pairs of consecutive integers are solutions. ![]() If the first integer is n = 11 If the first integer is n = −12 then the next integer is n + 1 then the next integer is n + 1 11 + 1 −12 + 1 12 −11 If the first integer is n = 11 If the first integer is n = −12 then the next integer is n + 1 then the next integer is n + 1 11 + 1 −12 + 1 12 −11 ![]() So there are two sets of consecutive integers that will work. There are two values for n n that are solutions to this problem. The first integer times the next integer is 132. The product of the two consecutive integers is 132. Let n = the first integer n + 1 = the next consecutive integer Let n = the first integer n + 1 = the next consecutive integer We are looking for two consecutive integers.
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