m/n =2.==> m = 2n
-m.n -8-5+6m=-27
-n(2n) +6.(2n) - 13 + 27 = 0
- n^2 + 12n + 14 = 0(-1)
n^2 - 12n - 14 = 0
delta= (-12)^2 + 4.1.14= 144 + 56 = 200
n= 12 +/- V200 ==> n=12+/-10V2 ==> n= 2(6+/-5V2)
2.1 2 2
n1= 6 + 5V2 ; n2 = 6 - 5V2
m = 2n
m1 = 2(6 + 5V2) ; m2= 2(6 - 5V2)
