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x in (-oo:+oo)
((2*x-3)^2)/7 = 4 // - 4
((2*x-3)^2)/7-4 = 0
((2*x-3)^2)/7+(-4*7)/7 = 0
(2*x-3)^2-4*7 = 0
4*x^2-12*x-19 = 0
4*x^2-12*x-19 = 0
4*x^2-12*x-19 = 0
DELTA = (-12)^2-(-19*4*4)
DELTA = 448
DELTA > 0
x = (448^(1/2)+12)/(2*4) or x = (12-448^(1/2))/(2*4)
x = (8*7^(1/2)+12)/8 or x = (12-8*7^(1/2))/8
(x-((12-8*7^(1/2))/8))*(x-((8*7^(1/2)+12)/8)) = 0
((x-((12-8*7^(1/2))/8))*(x-((8*7^(1/2)+12)/8)))/7 = 0
((x-((12-8*7^(1/2))/8))*(x-((8*7^(1/2)+12)/8)))/7 = 0 // * 7
(x-((12-8*7^(1/2))/8))*(x-((8*7^(1/2)+12)/8)) = 0
( x-((12-8*7^(1/2))/8) )
x-((12-8*7^(1/2))/8) = 0 // + (12-8*7^(1/2))/8
x = (12-8*7^(1/2))/8
( x-((8*7^(1/2)+12)/8) )
x-((8*7^(1/2)+12)/8) = 0 // + (8*7^(1/2)+12)/8
x = (8*7^(1/2)+12)/8
x in { (12-8*7^(1/2))/8, (8*7^(1/2)+12)/8 }
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