Question

1 = 2
2 = 4
3 = 9
4 = ?

Answer 1

16 is ?
but if you are squaring the number then
1^2- 1

Answer 2

$hi \\ \\ {1}^{2} = 1 \times 1 = 1 \\ \\ {2}^{2} = 2 \times 2 = 4 \\ \\ {3}^{2} = 3 \times 3 = 9 \\ \\ {4}^{2} = 4 \times 4 = 16$