x^2-8/9x=64/81

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Solution for x^2-8/9x=64/81 equation: 


x in (-oo:+oo)

x^2-((8/9)*x) = 64/81 // - 64/81

x^2-((8/9)*x)-(64/81) = 0

x^2+(-8/9)*x-64/81 = 0

x^2-8/9*x-64/81 = 0

DELTA = (-8/9)^2-(-64/81*1*4)

DELTA = 320/81

DELTA > 0

x = ((320/81)^(1/2)+8/9)/(1*2) or x = (8/9-(320/81)^(1/2))/(1*2)

x = ((320/81)^(1/2)+8/9)/2 or x = (8/9-(320/81)^(1/2))/2

x in { (8/9-(320/81)^(1/2))/2, ((320/81)^(1/2)+8/9)/2 }

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