- #1
Ceva
- 12
- 1
Hello this is my first post here. I found a problem in algebra which i cannot solve and don't even know if there are solutions as asked.
It is that one:
Find all the integer solutions (x,y) that satisfy the equation:
×3-727× = y3 - 727y
x3 - y3 = 727x - 727y
(x-y)(x2+xy+y2)=727(x-y)
I didn't divided by (x-y) because i think i'll lose solutions. Also, x-y can be zero (i think).
So i finally have: (x-y)(x2+xy+y2-727)=0
How can i continue? Can i factorize more the second bracket? Or i can solve it graphically?
Also, x-y=0 doesn't mean that i have infinite solutions? If i set myself x and y Ε Z .
It is that one:
Homework Statement
Find all the integer solutions (x,y) that satisfy the equation:
Homework Equations
×3-727× = y3 - 727y
The Attempt at a Solution
x3 - y3 = 727x - 727y
(x-y)(x2+xy+y2)=727(x-y)
I didn't divided by (x-y) because i think i'll lose solutions. Also, x-y can be zero (i think).
So i finally have: (x-y)(x2+xy+y2-727)=0
How can i continue? Can i factorize more the second bracket? Or i can solve it graphically?
Also, x-y=0 doesn't mean that i have infinite solutions? If i set myself x and y Ε Z .