Could someone give me a method to this question?: Rewrite 9991 as the difference of two squares. Use your answer to find the prime factors of 9991. Than could someone give me methods to work out any of these annoying square number questions?
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Originally Posted by Mukilab Could someone give me a method to this question?: Rewrite 9991 as the difference of two squares. Use your answer to find the prime factors of 9991. Than could someone give me methods to work out any of these annoying square number questions? As the last digit is a 1 I'm guessing 9 (3^2) is involved). Adding 9 to 9991 gives 10,000 which is also a square number Rewrite as the difference of two squares
Originally Posted by e^(i*pi) As the last digit is a 1 I'm guessing 9 (3^2) is involved). Adding 9 to 9991 gives 10,000 which is also a square number Rewrite as the difference of two squares thanks. Really cleared a lot up
anothe method : let , then . one of the solution (i think it is a trivial solution) is and . solve it, we get , and
Truly a fun method! Thanks for the help
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