Assuming that it is only the x that is being squared.
(-21x^2)/39 = (-7x^2)/13
-39
39
7 divided by 13 times 2 divided by 3 is 14/39
39 ÷ 21 = 1 with remainder 18 or 1.8571 times.
6.33333 repeating or rounded to 6.3
39 squared is 1521.
You multiply 39 by itself.
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.
39-15+18 6x3 Answer: 25
17
Assuming you meant 437 divided by 39 (not the other way round as in your question)...39 goes into 437 - 11 times. 11 x 39 = 429.437 - 429 = 8. Therefore the answer to the question 'what is 437 divided by 8' is 11 remainder 8.
7.8