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((-9/6)*x-2)*(36*x^2-((4/7)*x)) = 0
((-9/6)*x-2)*(36*x^2+(-4/7)*x) = 0
(-3/2*x-2)*(36*x^2-4/7*x) = 0
36*x^2-4/7*x = 0
4*x*(9*x-1/7) = 0
9*x-1/7 = 0 // + 1/7
9*x = 1/7 // : 9
x = 1/7/9
x = 1/63
4*x*(x-1/63) = 0
4*x*(-3/2*x-2)*(x-1/63) = 0
( -3/2*x-2 )
-3/2*x-2 = 0 // + 2
-3/2*x = 2 // : -3/2
x = 2/(-3/2)
x = -4/3
( 4*x )
4*x = 0 // : 4
x = 0
( x-1/63 )
x-1/63 = 0 // + 1/63
x = 1/63
x in { -4/3, 0, 1/63 }
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