1-x-12x^2/1-9x^2

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Solution for 1-x-12x^2/1-9x^2 equation: 


x in (-oo:+oo)

1-((12*x^2)/1)-(9*x^2)-x = 0

1-12*x^2-9*x^2-x = 0

1-21*x^2-x = 0

DELTA = (-1)^2-(-21*1*4)

DELTA = 85

DELTA > 0

x = (85^(1/2)+1)/(-21*2) or x = (1-85^(1/2))/(-21*2)

x = (85^(1/2)+1)/(-42) or x = (1-85^(1/2))/(-42)

x in { (85^(1/2)+1)/(-42), (1-85^(1/2))/(-42) }

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