Question

what is k^2+5k-6=0 ?

Answer 1

$Factorise\ equation:\\\\ k^2+5k-6=0\ \ \ \ | write\ 5k\ as\ -k+6k\\\\ \alpha k(k+6)-1(k+6)=0\\\\k^2-k+6k-6=0\\\\(k-1)(k+6)=0\\\\k=1\ \ \ or\ \ \ k=-6$