Question 623649
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Hi,  
Find all the zeros of the equation: 
-4x^4 - 44x^2 + 3600 = 0    | Let X = x^2
-4X^2 - 44X + 3600 = 0
  X^2 + 11X - 900 = 0
{{{x = (-b +- sqrt( b^2-4*a*c ))/(2*a) }}}
{{{X = (-11 +- sqrt( 3721 ))/(2) }}}
  X = 25 OR X = -36
  x^2 = 25,  x= ±5   Zeros
  x^2 = -36  x = ±6i