Question

5x al cuadrado = 12 + x cuanto vale x

Answer 1

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${5x}^{2} = 12 + x \\ {5x}^{2} - x - 12 = 0 \\ x = \frac{ - ( - 1) \frac{ + }{} \sqrt{ {( - 1)}^{2} - 4(5)( - 12) } }{2(5)} \\ x = \frac{1 \frac{ + }{} \sqrt{241} }{10} \\ x = \frac{1 + \sqrt{241} }{10} \: \: \: o \: \: \: x = \frac{1 - \sqrt{241} }{10}$