Question 590864
{{{ 3x^2 - 31x + 80 }}}
Use the quadratic formula
 {{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{ a = 3 }}}
{{{ b = -31 }}}
{{{ c = 80 }}}
{{{x = (-(-31) +- sqrt( (-31)^2 - 4*3*80 )) / (2*3) }}}
{{{x = ( 31 +- sqrt( 961 - 960 )) / 6 }}}
{{{x = ( 31 +- sqrt( 1 )) / 6 }}}
{{{ x = ( 31 + 1 ) / 6 }}}
{{{ x = 32/6 }}}
{{{ x = 16/3 }}}
and
{{{ x = ( 31 - 1 ) / 6 }}}
{{{ x = 30 / 6 }}}
{{{ x = 5 }}}
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{{{ x - 16/3 = 0 }}}
{{{ 3x - 16 = 0 }}}
{{{ x - 5 = 0 }}}
{{{ ( 3x - 16 )*( x - 5 ) = 3x^2 - 31x + 80 }}}