I'm worried that I may not understand your question.
If you mean, "What is the numerical answer to 39 squared?" IE., 39^2 or 39x39,
you can type it into a calculator or use long multiplication to find out that it is 1521.
If you are asking about what 'squared' is:
Squaring a number is the same as multiplying it by itself 2 times, so 39^2 = 39 x 39
We can also say that the number 39 is being raised to the power of 2.
Cubing a number is multiplying it by itself 3 times (to the power of 3), so 39^3 = 39 x 39 x 39
Note: The little ^ thing indicates that the 2 and 3 coming after it are smaller and written up in the corner.
39 squared is 1521.
100cm squared = 0.01 metres squared
5x squared
4 m squared 1cm sqaured is equal to 0.0001m squared
1 yd = 3 ft 1 foot = 12 in 1 foot squared = 12 inches x 12 inches 1 foot squared = 144 squared inches 1 yard squared = 3 feet by 3 feet 1 yard squard = 9 squared feet 1 yard squared = 9 squared feet x 144 squared inches 1 yard squared =1296 squared inches 5 yards squared = 1296 squared inches x 5 5 yards squared = 6480 inches squared
You multiply 39 by itself.
39 squared is 1521.
Assuming that it is only the x that is being squared. (-21x^2)/39 = (-7x^2)/13
4u2 - 6u - 39 does not have rational factors.
6 squared is 36. 36 plus 3 is 39
1521 Source Texas instrument calculator1521
39
1521 - 39 squared 1600 - 40 squared 1681 - 41 squared 1764 - 42 squared
The difference is 39.
-39
A = 540 units squared.
64 - 25 = 39