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

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


x in (-oo:+oo)

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

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

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

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

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

DELTA = 137/100

DELTA > 0

x = ((137/100)^(1/2)+3/10)/(2/5*2) or x = (3/10-(137/100)^(1/2))/(2/5*2)

x = 5/4*((137/100)^(1/2)+3/10) or x = 5/4*(3/10-(137/100)^(1/2))

x in { 5/4*(3/10-(137/100)^(1/2)), 5/4*((137/100)^(1/2)+3/10) }

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