integer solutons

• May 16th 2010, 11:26 AM
hmmmm
integer solutons
find integer solutions, if any exist to 3x^3 + 7y^2 = 2,
thanks for any help
• May 16th 2010, 11:30 AM
roninpro
Take the equation modulo 3.

$3x^3+7y^2\equiv y^2\equiv 2\pmod{3}$

Anything wrong with this?
• May 16th 2010, 01:58 PM
hmmmm
ah thanks very much for that