Question

√x=-x+3 Помогите с алгеброй

Answer 1

x=(-x+3)^2
x=x^2-6x+9
x^2-7x+9=0
D=13
x1=7+sqrt(13)/2=4,5+sqrt(13)/2
x2=7-sqrt(13)/2=4,5-sqrt(13)/2