Question 330925
{{{(s+1/4)(s+1/5)}}}...we can write it as

{{{(s+1/4)(s+1/5)=0}}}

first find common denominator; for {{{4}}} and {{{5}}} it is {{{20}}}, so multiply both sides by {{{20}}}

{{{(s+1/4)(s+1/5)*20=0*20}}}
{{{(20s+(20*1)/4)(20s+(20*1)/5)*20=0*20}}}
{{{(20s+ 5)(20s+4)*20=0}}}
{{{(400s^2+ 80s+ 100s +20)=0}}}
{{{(400s^2+ 180s +20)=0}}}...simplify (divide both side by {{{10}}})
{{{(40s^2+ 18s+2)=0}}}

now solve quadratic equation to find value of {{{s}}} which will be represent as an {{{x}}} in following part:

*[invoke quadratic_formula 40, 18, 2, "x"]