Quadratic equation

Asked by Abhijeetoo7 | 10th Feb, 2010, 10:03: AM

Expert Answer:

Let the number be x.

x + 1/x = 281/80

x2 + 1 = 281x/80

80x2 + 80 = 281x

80x2 - 281x + 80 = 0

x = [281±(2812 - 4x80x80)]/160

= [281±231]/160

= 16/5  or 5/16

The number is 16/5, or 5/16.

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Answered by  | 10th Feb, 2010, 10:36: AM

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