найдите корень уравнения x^2+9=(x-1)^2

x^2 + 9 = (x - 1)^2
x^2 + 9 = x^2 - 2x + 1
x^2 + 9 -x^2 + 2x -1 = 0
2x + 8 = 0
2x = -8
x = -4

x^2+9=(x-1)^2
x^2+9=x^2-2x+1
x^2-x^2+2x-1+9=0
2x+8=0
2x= -8
x= -4