Вопрос школьника по предмету Математика
X²+(9-x) =11,31
Помогите решить!
Ответ учителя по предмету Математика
Ответ:
два решения
х=2,1 или х=-1,1
Пошаговое объяснение:
приведем к такому виду:
x^2-x+0,25=11,31-9+0,25
(x-0,5)^2=2,56
(x-0,5)^2=1,6^2
x1=2,1 x2=-1,1
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