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a in (-oo:+oo)
(a*((2*a-3)/4))/5.6-(3*a) = 0
(a*((2*a-3)/4))/5.6-3*a = 0
(a*(2*a-3))/(4*5.6)-3*a = 0
(a*(2*a-3))/(4*5.6)+(-3*4*5.6*a)/(4*5.6) = 0
a*(2*a-3)-3*4*5.6*a = 0
2*a^2-70.2*a = 0
2*a^2-70.2*a = 0
a*(2*a-70.2) = 0
2*a-70.2 = 0 // + 70.2
2*a = 70.2 // : 2
a = 70.2/2
a = 35.1
a*(a-35.1) = 0
(a*(a-35.1))/(4*5.6) = 0
(a*(a-35.1))/(4*5.6) = 0 // * 4*5.6
a*(a-35.1) = 0
( a-35.1 )
a-35.1 = 0 // + 35.1
a = 35.1
( a )
a = 0
a in { 35.1, 0 }
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