Question

Помогите пожалуйста!!!!!​

Answer 1

Ответ:

${x}^{2} + 6x - 27 = 3 \\ \\ {x}^{2} + 6x - 30 = 0 \\ d = 36 - 4 \times ( - 30) = 36 + 120 = 156 \\ x1 = \frac{ - 6 - \sqrt{156} }{2} = \frac{ - 6 - 2\sqrt{39} }{2} = \frac{2( - 3 - \sqrt{39}) }{2} = - 3 - \sqrt{39} \\ x2 = \frac{ - 6 + \sqrt{156} }{2} = \frac{ - 6 + 2 \sqrt{39} }{2} = \frac{2( - 3 + \sqrt{39} )}{2} = - 3 + \sqrt{39} \\ \\ x1 = - 3 +\sqrt{39} \\ x2 = - 3 - \sqrt{39}$