Question 414749
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Hi
solving using the Quadratic Formula:  {{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
21z^2+85z-26=0
{{{x = (-85 +- sqrt( 9409))/(42) }}} 
{{{x = (-85 +- 97))/(42) }}} 
  x = -182/42      x = 12/42
  x = -4  1/3      x = 6/7 = .8571