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x in (-oo:+oo)
x*((x+3)/3)+x*((2*x+2)/4) = 17/12 // - 17/12
x*((x+3)/3)+x*((2*x+2)/4)-(17/12) = 0
x*((x+3)/3)+x*((2*x+2)/4)-17/12 = 0
(x*(x+3))/3+(x*(2*x+2))/4-17/12 = 0
(4*12*x*(x+3))/(3*4*12)+(3*12*x*(2*x+2))/(3*4*12)+(-17*3*4)/(3*4*12) = 0
4*12*x*(x+3)+3*12*x*(2*x+2)-17*3*4 = 0
120*x^2+216*x-204 = 0
120*x^2+216*x-204 = 0
12*(10*x^2+18*x-17) = 0
10*x^2+18*x-17 = 0
DELTA = 18^2-(-17*4*10)
DELTA = 1004
DELTA > 0
x = (1004^(1/2)-18)/(2*10) or x = (-1004^(1/2)-18)/(2*10)
x = (2*251^(1/2)-18)/20 or x = (-2*251^(1/2)-18)/20
12*(x-((-2*251^(1/2)-18)/20))*(x-((2*251^(1/2)-18)/20)) = 0
(12*(x-((-2*251^(1/2)-18)/20))*(x-((2*251^(1/2)-18)/20)))/(3*4*12) = 0
(12*(x-((-2*251^(1/2)-18)/20))*(x-((2*251^(1/2)-18)/20)))/(3*4*12) = 0 // * 3*4*12
12*(x-((-2*251^(1/2)-18)/20))*(x-((2*251^(1/2)-18)/20)) = 0
( x-((-2*251^(1/2)-18)/20) )
x-((-2*251^(1/2)-18)/20) = 0 // + (-2*251^(1/2)-18)/20
x = (-2*251^(1/2)-18)/20
( x-((2*251^(1/2)-18)/20) )
x-((2*251^(1/2)-18)/20) = 0 // + (2*251^(1/2)-18)/20
x = (2*251^(1/2)-18)/20
x in { (-2*251^(1/2)-18)/20, (2*251^(1/2)-18)/20 }
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