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12*r^2+7*r*s-(10*s^2) = 0
12*r^2+7*r*s-(10*s^2) = 0
12*r^2+7*r*s-(10*s^2) = 0
12*r^2+7*r*s-10*s^2 = 0
12*r^2-10*s^2+7*r*s = 0
x naleu017Cy do R
x belongs to the empty set
(27*r^3-(8*s^3))/(12*r^2+7*r*s-(10*s^2)) = 0
x belongs to the empty set
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