Question 693730
{{{5x^2-8x+2}}}
if it can't be done with "reverse foil" you can always use the Quadratic Formula

{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}

a=5
b=-8
c=2

{{{x = (-(-8) +- sqrt( -8^2-4*5*2 ))/(2*5) }}}
Multiply 
{{{x = (8 +- sqrt(64-40))/10 }}}
Subtract and simplfy
{{{x = (8 +- 2sqrt(6))/10 }}} {{{x = (4 +- sqrt(6))/5 }}}