x^2-9/5x-20

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Solution for x^2-9/5x-20 equation: 


x in (-oo:+oo)

x^2-((9/5)*x)-20 = 0

x^2+(-9/5)*x-20 = 0

x^2-9/5*x-20 = 0

DELTA = (-9/5)^2-(-20*1*4)

DELTA = 2081/25

DELTA > 0

x = ((2081/25)^(1/2)+9/5)/(1*2) or x = (9/5-(2081/25)^(1/2))/(1*2)

x = ((2081/25)^(1/2)+9/5)/2 or x = (9/5-(2081/25)^(1/2))/2

x in { (9/5-(2081/25)^(1/2))/2, ((2081/25)^(1/2)+9/5)/2 }

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