Question 621731
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Hi,
Using Common Denominator..
{{{7 = -12/x - 1/x^2}}}   |||Multiplying thru by x^2 so as all denominators = 1
  7x^2 = -12x - 1
 7x^2 + 12x + 1 = 0
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{x = (-12 +- sqrt( 144-28 ))/(14) }}} 
{{{x = (-12 +- sqrt( 116))/(14) }}} 
{{{x = (-12 +- sqrt( 4*29))/(14) }}}
{{{x = (-12 +- 2sqrt( 29))/(14) }}} 
  x = -0.0878 or x =  -1.6265