Question 964233
(Step 1)       {{{ b^2+a^2=c^2 }}}
(Step 2)       {{{ sqrt( b^2+a^2 ) = sqrt( c^2 ) }}}
(Step 3)       b+a=c
-----------
Step 3 is not correct.
(b + a)^2 <> b^2 + a^2