Given that (y-4)²=16,find the values of y

Question

Please answer

Answer 1

4²=16

y²-16=16

y=0

Comments

oh no...your answer is wrong. This question got two answers

(y-4)² = 16
y²-8y+16 = 16   
(how? formula: (a-b)² = a²-2ab+b²)
y²-8y+16-16 = 0
y²-8y = 0
(y)(y-8)=0
y= 0  ,  y= 8

y       0     |    0
y      -8     |  -8y  
----------------------
y²     0     |  -8y

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i use the answer 0

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ya, this question got power 2 so got 2 answers. Answer 0 is correct but another answer is 8.

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ok thank you