Question 878745
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{x = (-(-1) +- sqrt( (-1)^2-4*(1)*(4)))/(2*1)}}}
applying the direct formula.
we get, 

{{{x = 1 +- sqrt(15)}}}

that is {{{a = 1+sqrt(15)}}}
and {{{b = 1-sqrt(15)}}}
then u get::::: b/a + a/b = 
{{{((1-sqrt(15))/(1+sqrt(15)) + (1+sqrt(15))/(1-sqrt(15)))}}}
u need to solve this like this : 
{{{ (b^2 + a^2)/ab }}}
so,
{{{((1 - sqrt(15))^2) + (1 + sqrt(15))^2))}}}X{{{1/(1^2 - sqrt(15)^2)}}}

solving further, 

{{{ (1 - 15 - 2*sqrt(15) + 1 + 15 + 2*sqrt(15))/(-14) }}}


cancel out + {{{- 15 - 2*sqrt(15)}}} and {{{+ 15 + 2*sqrt(15)}}}

we get {{{ -2/14 }}} which is {{{ - 1/7 }}}