0=-1x^2/10+9x/10+11/5

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Solution for 0=-1x^2/10+9x/10+11/5 equation: 


x in (-oo:+oo)

0 = (-1*x^2)/10+(9*x)/10+11/5 // - (-1*x^2)/10+(9*x)/10+11/5

0-((-1*x^2)/10)-((9*x)/10)-(11/5) = 0

(-9/10)*x-((-x^2)/10)-11/5 = 0

1/10*x^2-9/10*x-11/5 = 0

DELTA = (-9/10)^2-(-11/5*1/10*4)

DELTA = 169/100

DELTA > 0

x = ((169/100)^(1/2)+9/10)/(1/10*2) or x = (9/10-(169/100)^(1/2))/(1/10*2)

x = 11 or x = -2

x in { -2, 11 }

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