It can mean a few things. One is a math or measurement term, used usually to see if you have exact right angles in certain situations... whether something is "square" (and you are hoping that it is).
This meaning can also be used in general use when some people say that something is not quite square, meaning not quite right... I have heard it used this way, but am not sure how prevalent it is.
Another meaning is somewhat outdated slang. Calling someone a "square" might be the same thing as a "geek" or a "nerd," although square seemed to be more negative than the current words, which can be negative, but can also be worn proudly and self-applied.
It is: 2b squared
-2p squared
6 squared plus 9 squared is equal to 117.
12 squared plus 18 squared is equal to 468.
Sin squared, cos squared...you removed the x in the equation.
he made the theorem C squared = A squared + B squared and A squared = C squared - B squared or B squared = C squared - A squared
3x squared - x squared = 2x squared
9x squared-15x squared = -6
2 squared X 3 squared = 5 squared
1 squared = 1 2 squared = 4 3 squared = 9 4 squared = 16 5 squared = 25 6 squared = 36 7 squared = 49 8 squared = 64 9 squared = 81 10 squared = 100
9 squared is 81 and 16 squared is 256
100cm squared = 0.01 metres squared
T squared is T times T. T squared and T squared appears to be the addition of T squared with itself. That answer would be 2T squared or 2T^2
104
1 squared plus 8 squared or 4 squared plus 7 squared
144 squared x 36 squared is equal to 26,873,856.
3x squared - (3x) squared = 0