Answers

2014-06-12T11:07:10+08:00
= 9 - 5= 4
= 4^2 = 16
= the square of difference of 9 - 5 is equal to 16
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2014-06-12T13:13:33+08:00
9 - 15 = 4
4^2 = 16

16 is the answer.
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