Question

y=2x^-11х+5 равно -7? Помогите пожалуйста!)

Answer 1

2x^-11х+5= -7
2x^-11х+12 =0
D = 121 - 4*2*12 = 121 - 96 = 25 = 5²
$x_{1} = \frac{11+5}{2*2} = \frac{16}{4} = 4$
$x_{1} = \frac{11-5}{2*2} = \frac{6}{4} = 1,5$

Ответ: 1,5; 4