Question

Help me please i so need help

Answer 1

9, these are all referring to the square root of a number that is a perfect square. 2 x 2 = 4, 3 x 3 = 9, 4 x 4 = 16, 9 x 9 = 81.

Answer 2

9

It is 9 because 9 is the only number that multiplied by itself is 81.