x/2-x^2/5-1/5

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Solution for x/2-x^2/5-1/5 equation: 


x in (-oo:+oo)

x/2-((x^2)/5)-(1/5) = 0

x/2-((x^2)/5)-1/5 = 0

1/2*x-1/5*x^2-1/5 = 0

DELTA = (1/2)^2-(-1/5*(-1/5)*4)

DELTA = 9/100

DELTA > 0

x = ((9/100)^(1/2)-1/2)/(-1/5*2) or x = (-(9/100)^(1/2)-1/2)/(-1/5*2)

x = 1/2 or x = 2

x in { 1/2, 2 }

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