Question 1131860


If 
{{{5x + x^2 > 100}}}

{{{5x + x^2 -100> 0}}}

{{{ x^2 +5x-100> 0}}}

find zeros:

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

{{{x = (-5 +- sqrt( 5^2-4*1*(-100) ))/(2*1) }}} 

{{{x = (-5 +- sqrt( 25+400) ))/2 }}} 

{{{x = (-5 +- sqrt( 425) ))/2 }}} 

{{{x = (-5 +- sqrt( 17*25) ))/2 }}} 

{{{x = (-5 +- 5sqrt( 17) ))/2 }}} 

{{{x = (5/2)(-1 +- sqrt( 17) ) }}} 

solutions:

{{{x = (5/2)(-1 + sqrt( 17) ) }}} 

or

{{{x = (5/2)(-1 - sqrt( 17) ) }}} 


then {{{x}}} is not  equal to {{{ (5/2)(-1 + sqrt( 17) ) }}} or {{{ (5/2)(-1 - sqrt( 17) ) }}}