i need to solve it find (x,y,z)
replace x y and z with expression of a1 a2 a3 and get the span of the image in some basis
but after doing somw row reduction i get a line of zeros equals some exprression
and here y is a free variable so i cant get expressiom of a1 a2 a3 of it
what to do?
i need only a1 a2 a3 reprentation
having free variables messes it up