Question

2x (в квадрате) - 4x + 2 = 0

Answer 1

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


((A-B)²=A²-2A.B+B²)
(A²=0⇔A=0)

Answer 2

2x²-4x+2=0|:2
x²-2x+1=0
D=4-4=0
$x= frac{-b}{2a}=frac{2}{2}=1$
Ответ:1.