GOI HAI SO CAN TIM LA A VA B(nho them dieu kien cua a va b )
theo de ra ta co a/b=3/8
suy ra a=3/8*b
vi hieu binh phuong 2 so do la -880
suy ra a2 -b2=-880 (1)
thay a=3/8*b vao (1) ta duoc
(3/8*b)2-b2=-880
9/8*b2-b2=-880
(9/8-1)b2=-880
1/8*b2=-880
b2 =-880/ 1/8
b2 =-7040
ma b2>0
-7040<0
suy ra b2=-7040(vo ly )
suy ra b thuoc tap rong
vay khong ton tai 2 so
thoa man de bai