Flexibility Matrix Method of Analysis of Beams - Problem No 2

To know how to find inverse of 2x2 matrix in the calculator,
https://www.youtube.com/watch?v=SA-TiA0Obgk

Same beam has been analysed by stiffness Matrix Method,
https://www.youtube.com/watch?v=l5bIFtCBP5g

Same beam has been analysed by Moment Distribution method,
https://www.youtube.com/watch?v=sJwG3Q9UP4E

Same Beam has been analysed by Slope Deflection Method,
https://www.youtube.com/watch?v=zKJeCYxgKZw

Same beam has been analysed by Clapeyron's Theorem of Three Moments
https://www.youtube.com/watch?v=4e01RyHldW

Structural AnalysisFlexibility Matrix MethodCompatibility Method