Question

(х-1)² = - 4х
решите уравнение)

Answer 1

(x-1)²= -4x
x²-2x+1= -4x
x²+2x+1=0
(x+1)²=0
x+1=0
x= -1

Answer 2

x^2 -2x +1 = -4x   
x^2 -2x+1 +4x=0 
x^2 +2x +1 =0
D= 2^2 -4*1*1=0
x= -1