Tìm $x,y\epsilon \mathbb{Z}$ sao cho $x^{2}+2xy+2y^{2}-6x-8y=26$
Edited by Mikhail Leptchinski, 16-12-2014 - 00:35.
Tìm $x,y\epsilon \mathbb{Z}$ sao cho $x^{2}+2xy+2y^{2}-6x-8y=26$
Edited by Mikhail Leptchinski, 16-12-2014 - 00:35.
$x,y\epsilon \mathbb{Z} . Sao cho x^{2} + 2xy +2y^{2} - 6x - 8y = 26$
$PT\Leftrightarrow (x+y-3)^2+(y-1)^2=36=6^2+0^2$
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