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X in (-oo:+oo)
((-10/7)*X-6)*(49*X^2-((36/13)*X)) = 0
((-10/7)*X-6)*(49*X^2+(-36/13)*X) = 0
(-10/7*X-6)*(49*X^2-36/13*X) = 0
49*X^2-36/13*X = 0
X*(49*X-36/13) = 0
49*X-36/13 = 0 // + 36/13
49*X = 36/13 // : 49
X = 36/13/49
X = 36/637
X*(X-36/637) = 0
X*(-10/7*X-6)*(X-36/637) = 0
( -10/7*X-6 )
-10/7*X-6 = 0 // + 6
-10/7*X = 6 // : -10/7
X = 6/(-10/7)
X = -21/5
( X-36/637 )
X-36/637 = 0 // + 36/637
X = 36/637
( X )
X = 0
X in { -21/5, 36/637, 0 }
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