4/5x^2-3/10x=1/5

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Solution for 4/5x^2-3/10x=1/5 equation: 


x in (-oo:+oo)

(4/5)*x^2-((3/10)*x) = 1/5 // - 1/5

(4/5)*x^2-((3/10)*x)-(1/5) = 0

(4/5)*x^2+(-3/10)*x-1/5 = 0

4/5*x^2-3/10*x-1/5 = 0

DELTA = (-3/10)^2-(-1/5*4/5*4)

DELTA = 73/100

DELTA > 0

x = ((73/100)^(1/2)+3/10)/(4/5*2) or x = (3/10-(73/100)^(1/2))/(4/5*2)

x = 5/8*((73/100)^(1/2)+3/10) or x = 5/8*(3/10-(73/100)^(1/2))

x in { 5/8*(3/10-(73/100)^(1/2)), 5/8*((73/100)^(1/2)+3/10) }

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