Mathlamaredutermsaspx college algebra now the

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Unformatted text preview: convert to decimals and see what the solutions actually are. x= -3 + 309 = 7.2892 2 and x= -3 - 309 = -10.2892 2 So, we have one positive and one negative. From the stand point of needing the dimensions of a field the negative solution doesn’t make any sense so we will ignore it. Therefore, the length of the field is 7.2892 feet. The width is 3 feet longer than this and so is 10.2892 feet. Notice that the width is almost the second solution to the quadratic equation. The only difference is the minus sign. Do NOT expect this to always happen. In this case this is more of a function of the problem. For a more complicated set up this will NOT happen. © 2007 Paul Dawkins 107 College Algebra Now, from a physical standpoint we can see that we should expect to NOT get complex solutions to these problems. Upon solving the quadratic equation we should get either two real distinct solutions or a double root. Also, as the previous example has shown, when we get two real distinct solutions we will be able t...
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This note was uploaded on 06/06/2012 for the course ICT 4 taught by Professor Mrvinh during the Spring '12 term at Hanoi University of Technology.

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