factor() cmd

[compsystems]

Hello BP

autosimplify(0):;

factor(x³-6*x²+11*x=6,x) returns x*(x^2-6*x+11)=6

solve(( a² - 1 )*x = a + 1, x, '=' ) returns "Done",set[ x=((a+1)/(a^2-1)) ]

factor( set[ x=((a+1)/(a^2-1)) ] ) Does nothing.

but accidentally placing the value of x

factor( set[ x=((a+1)/(a^2-1)), x ] ) returns x=(1/(a-1))

factor( set[ x=((a+1)/(a^2-1)) ], a ) => x=(1/(a-1))