Question

20 PONTOSx²-y²=65
2xy=72
RESOLVER SISTEMA

Answer 1

2XY=72
X=72/2Y
X=36Y

SUBSTITUINDO O VALOR DE X  EM X2-Y2=65
(36Y)2-Y2=65
1296Y2-Y2=65
1295Y2=65
Y2=65/1295=13/259
Y=RAIZ DE 13/259
X=RAIZ DE 13/259.36