x^2-1/10x-9/10

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Solution for x^2-1/10x-9/10 equation: 


x in (-oo:+oo)

x^2-((1/10)*x)-(9/10) = 0

x^2+(-1/10)*x-9/10 = 0

x^2-1/10*x-9/10 = 0

DELTA = (-1/10)^2-(-9/10*1*4)

DELTA = 361/100

DELTA > 0

x = ((361/100)^(1/2)+1/10)/(1*2) or x = (1/10-(361/100)^(1/2))/(1*2)

x = 1 or x = -9/10

x in { -9/10, 1 }

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