Question

-x² + 6x-9=0 помогите пожалуйста ​

Answer 1

$- {x}^{2} + 6x - 9 = 0 \ - ( {x}^{2} - 6x + 9) = 0 \ {x}^{2} - 2 times 3 times x + {3}^{2} = 0 \ {(x - 3)}^{2} = 0 \ x = 3$

Ответ:{3}