Respuesta :
I think you have to times x and 1 with 2 and thay answer add them then minus that with 4x
X^2+2X+1-4X
X^2-2X+1
Assuming equation equals zero
Factor
(X-1) (X-1)
X=1
X^2-2X+1
Assuming equation equals zero
Factor
(X-1) (X-1)
X=1