2y*3,6*5,5y/3x=0 7,2y*5,5y/3x=0 39,6y=x
2y*3,6*5,5y/3x=0 7,2y*5,5y/3x=0 39,6y²/3x=0 x=39,6y²:3 x=13,2y²
x=0 y=0