Question 761178
{{{
2x=1-sqrt( 2-x)
}}}

{{{
sqrt( 2-x)^2=(1-2x)^2
}}}


{{{
2-x=1-4x+4x^2
}}}

{{{4x^2-3x-1=0}}}

{{{(4x+1)(x-1)=0
}}}


but only x=-1/4 is a solution