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span data-sheets-value="{"1":2,"2":"If
x. y and z are real numbers such that (x-3)^2+(y-4)^2+(z-5)^2= 0 then (x+y+z) is equal to "}" data-sheets-userformat="{"2":769,"3":{"1":0},"11":4,"12":0}">If x, y and z are real numbers such that (x-3)2+(y-6)2+(z-8)2= 0 then (x+y+z) is equal to

A 19
B 17
C 14
D 13
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