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x^2*((16*x^5-(12*x^4))/4) = 0
x^2*((16*x^5-12*x^4)/4) = 0
(x^2*(16*x^5-12*x^4))/4 = 0
16*x^5-12*x^4 = 0
4*x^4*(4*x-3) = 0
4*x-3 = 0 // + 3
4*x = 3 // : 4
x = 3/4
4*x^4*(x-3/4) = 0
(4*x^2*x^4*(x-3/4))/4 = 0
( 4*x^4 )
4*x^4 = 0 // : 4
x^4 = 0
x = 0
( x-3/4 )
x-3/4 = 0 // + 3/4
x = 3/4
( x^2 )
1*x^2 = 0 // : 1
x^2 = 0
x = 0
x in { 0, 3/4, 0 }
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