9a squared = 81a^2
4
4x4=16 or 2^4=16
1 squared plus 8 squared or 4 squared plus 7 squared
8 squared x 2 is equal to 128.
2 squared equals 4 - wherever it is found!
only when x is equal to 2
A^2 + B^2 = C^2 Side A squared plus Side B squared has to equal Side C squared
2^2 + 3^2 = 4 + 9 = 13
1 squared radical 40 is equal to 1 squared radical (4 x 10), and this become 2 squared radical 10. By adding 2 squared radical10 with 3 squared radical 10 we get 5 squared radical 10.
(4y)2 = 16y2
x2 + x2 = 2x2 2x^2