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(x-5)^2-(49/16) = 0
(x-5)^2-49/16 = 0
(16*(x-5)^2)/16-49/16 = 0
16*(x-5)^2-49 = 0
16*x^2-160*x+351 = 0
16*x^2-160*x+351 = 0
16*x^2-160*x+351 = 0
DELTA = (-160)^2-(4*16*351)
DELTA = 3136
DELTA > 0
x = (3136^(1/2)+160)/(2*16) or x = (160-3136^(1/2))/(2*16)
x = 27/4 or x = 13/4
(x-13/4)*(x-27/4) = 0
((x-13/4)*(x-27/4))/16 = 0
((x-13/4)*(x-27/4))/16 = 0 // * 16
(x-13/4)*(x-27/4) = 0
( x-13/4 )
x-13/4 = 0 // + 13/4
x = 13/4
( x-27/4 )
x-27/4 = 0 // + 27/4
x = 27/4
x in { 13/4, 27/4 }
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