Wtf is this:(1+_)**2=16

Question

answer

Answer 1

(1+x)^2=16 might look familiar, x=3

Answer 2

(1+_)**2=16
(1+_)=4
_=3

Answer 3

dunno

Answer 4

3

Answer 5

_=3

Answer 6

3

Answer 7

_=3

Answer 8

3

Answer 9

(1+3)**2=16

Answer 10

3

Answer 11

that is 3

Answer 12

(1+3)**2=16
(1+3)=4