Respuestas

2014-02-09T23:23:43+01:00
X - y = 5
x^2 + y^2 =377


x -y=5
x=5+y


x^2 + y^2 =377
(5+y)^2 + y^2 =377
25 +10y +y^2 +y^2=377
2y^2 +10y -352=0
2(y^2 + 5y - 176=0)
y^2 +5y -176=0
(y+16)(y-11)

y+16=0
y= -16

y-11=0
y=11---------> respuesta



16 -11=5

16^2 + 11^2=377
256 + 121 = 377
377 = 377