Δ
1
,
2
±
Δ
3
,
4
=
m
λ
Δ
1
,
2
±
Δ
3
,
4
=
m
λ
Close
Log in
Books
Repository
eAnswer
ePortfolio
Close
Log in
Books
Repository
eAnswer
ePortfolio
Log in
New user
OK
Error
Forgot?
Log in
Register
Recover
OK
Error
Change