x^2-6/7x

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Solution for x^2-6/7x equation: 


x in (-oo:+oo)

x^2-((6/7)*x) = 0

x^2+(-6/7)*x = 0

x^2-6/7*x = 0

DELTA = (-6/7)^2-(0*1*4)

DELTA = 36/49

DELTA > 0

x = ((36/49)^(1/2)+6/7)/(1*2) or x = (6/7-(36/49)^(1/2))/(1*2)

x = 6/7 or x = 0

x in { 0, 6/7 }

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