Solution of Diophantine Equation $1+a^6=x^2$

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Does the equation $1+a^6=x^2$ have any other integer solutions except the trivial one $a=0,x=1$?










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    Does the equation $1+a^6=x^2$ have any other integer solutions except the trivial one $a=0,x=1$?










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      $begingroup$


      Does the equation $1+a^6=x^2$ have any other integer solutions except the trivial one $a=0,x=1$?










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      Does the equation $1+a^6=x^2$ have any other integer solutions except the trivial one $a=0,x=1$?







      number-theory diophantine-equations






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      edited Dec 31 '18 at 7:56









      dmtri

      1,7652521




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      asked Dec 31 '18 at 6:32









      ershersh

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      603113






















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          It's $$(x-a^3)(x+a^3)=1$$ and solve two systems:
          $$x-a^3=1$$ and $$x+a^3=1$$ or
          $$x-a^3=-1$$ and $$x+a^3=-1,$$
          which gives the answer for $(x,a)$:
          $${(1,0), (-1,0)}.$$






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            $x^2$ and $a^6$ are both perfect squares. And the only two perfect squares that differ by $1$ are $0$ and $1$ (because for any $nge 0$, the next biggest square after $n^2$ is $n^2+2n+1$).






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              2 Answers
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              2 Answers
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              $begingroup$

              It's $$(x-a^3)(x+a^3)=1$$ and solve two systems:
              $$x-a^3=1$$ and $$x+a^3=1$$ or
              $$x-a^3=-1$$ and $$x+a^3=-1,$$
              which gives the answer for $(x,a)$:
              $${(1,0), (-1,0)}.$$






              share|cite|improve this answer











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                5












                $begingroup$

                It's $$(x-a^3)(x+a^3)=1$$ and solve two systems:
                $$x-a^3=1$$ and $$x+a^3=1$$ or
                $$x-a^3=-1$$ and $$x+a^3=-1,$$
                which gives the answer for $(x,a)$:
                $${(1,0), (-1,0)}.$$






                share|cite|improve this answer











                $endgroup$
















                  5












                  5








                  5





                  $begingroup$

                  It's $$(x-a^3)(x+a^3)=1$$ and solve two systems:
                  $$x-a^3=1$$ and $$x+a^3=1$$ or
                  $$x-a^3=-1$$ and $$x+a^3=-1,$$
                  which gives the answer for $(x,a)$:
                  $${(1,0), (-1,0)}.$$






                  share|cite|improve this answer











                  $endgroup$



                  It's $$(x-a^3)(x+a^3)=1$$ and solve two systems:
                  $$x-a^3=1$$ and $$x+a^3=1$$ or
                  $$x-a^3=-1$$ and $$x+a^3=-1,$$
                  which gives the answer for $(x,a)$:
                  $${(1,0), (-1,0)}.$$







                  share|cite|improve this answer














                  share|cite|improve this answer



                  share|cite|improve this answer








                  edited Dec 31 '18 at 7:30

























                  answered Dec 31 '18 at 7:21









                  Michael RozenbergMichael Rozenberg

                  111k1897201




                  111k1897201























                      6












                      $begingroup$

                      $x^2$ and $a^6$ are both perfect squares. And the only two perfect squares that differ by $1$ are $0$ and $1$ (because for any $nge 0$, the next biggest square after $n^2$ is $n^2+2n+1$).






                      share|cite|improve this answer









                      $endgroup$


















                        6












                        $begingroup$

                        $x^2$ and $a^6$ are both perfect squares. And the only two perfect squares that differ by $1$ are $0$ and $1$ (because for any $nge 0$, the next biggest square after $n^2$ is $n^2+2n+1$).






                        share|cite|improve this answer









                        $endgroup$
















                          6












                          6








                          6





                          $begingroup$

                          $x^2$ and $a^6$ are both perfect squares. And the only two perfect squares that differ by $1$ are $0$ and $1$ (because for any $nge 0$, the next biggest square after $n^2$ is $n^2+2n+1$).






                          share|cite|improve this answer









                          $endgroup$



                          $x^2$ and $a^6$ are both perfect squares. And the only two perfect squares that differ by $1$ are $0$ and $1$ (because for any $nge 0$, the next biggest square after $n^2$ is $n^2+2n+1$).







                          share|cite|improve this answer












                          share|cite|improve this answer



                          share|cite|improve this answer










                          answered Dec 31 '18 at 7:33









                          TonyKTonyK

                          44.1k358137




                          44.1k358137






























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