Question 926311


if {{{(x-1)(x-3)=-1}}}

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

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

{{{x^2-4x+4=0}}}


{{{x = (-(-4) +- sqrt( (-4)^2-4*1*4 ))/(2*1) }}}


{{{x = (4 +- sqrt(16-16 ))/2 }}}

{{{x = (4 +- sqrt(0 ))/2 }}}

{{{x = (4 +- 0)/2 }}}

{{{x = 4/2 }}}

{{{highlight(x =2) }}}