Quantum Tunneling: Reflection and Transmission Probabilities Explained

[PGaccount]

(P₁ + P₂)² - 4P₁P₂ = (P₁ - P₂)² (A - B = C)

The reflection and transmission probabilities are

R = C/A

T = B/A

Can one understand this from the first equation?
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[kuruman]

Is the first "equation" one or two equations? It is written a bit unconventionally.

 

[Jilang]

That is not an equation. Are the brackets in the right places?

 

[PGaccount]

i just wrote A - B = C
to label the terms in the equation.