Respuesta :

gashomnaggom
 let the number be k 
so x^2+8x+K=11+k 
k=(coefficent of x/2)^2=8/2=4^2=16 
so x^2+8x+16=11+16 
(x+4)^2=27 

x+4=+-root of 27 
x=4+root of 27 or 4-root of 27

The answer is 16.according to apex

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