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(3/4)*(x-4)^2-12 = 0
3/4*(x-4)^2-12 = 0
3/4*(x-4)^2-12 = 0
3/4*x^2-6*x = 0
3/4*x^2-6*x = 0
3*x*(1/4*x-2) = 0
1/4*x-2 = 0 // + 2
1/4*x = 2 // : 1/4
x = 2/1/4
x = 8
3*x*(x-8) = 0
3*x*(x-8) = 0
( 3*x )
3*x = 0 // : 3
x = 0
( x-8 )
x-8 = 0 // + 8
x = 8
x in { 0, 8 }
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