Question

5-х²+5х-6=0
помогите решить

Answer 1

$- x^{2} + 5x - 1 = 0 \\ x12 = \frac{ - 5 + - \sqrt{ {5}^{2} - 4 \times ( - 1) \times ( - 1) } }{2 \times ( - 1)} \\ x = - \frac{ - 5 + \sqrt{21} }{2} \\ x = - \frac{ - 5 - \sqrt{21} }{2}$