Respuesta :

ghanami

Answer:

c=16

Step-by-step explanation:

hello :

x2+8x+c is the perfect square means : x²+8x+c= (x+a)²

x²+8x+c = x²+2ax+a²

so : 2a=8

      c=a²

a=8/2 = 4    but : c = a²

conclusion : c=16