Respuesta :

Answer: y= 4 or y= -12

Step-by-step explanation:

Y²-8y+16=64.

Rearrange

Y²-8y+16-64=0

Y²-8y-48=0

(Y²+12y)-(4y-48)=0

Y(y+12)-4(y+12)=0

(Y-4)=0 or (y+12)=0

Y-4=0 or y+12=0

Y=4 or y=-12