example10.7   
bus voltages at 2 buses are 
v1=1.081+i0.123,
v2=0.929+i-0.043
loss coffecients are 
b11=0.07877p.u
b22=0.07735p.u
b12=-0.00714p.u 
loss coffecients in actual values is 
b11=7.877236e-004M(W)-1
b22=7.734557e-004M(W)-1
b12=-7.136298e-005M(W)-1