Question 1081916
That means that 1 is a root
k^2*1-2k-3=0
(k-3)(k+1)=0
k=3, -1
check
9x^2-6x-3=0
3x^2-2x-1=0
(3x+1)(x-1)=0
----------------
x^2+2x-3=0
(x+3)(x-1)=0
{{{graph(300,300,-10,10,-10,10,3x^2-2x-1,x^2+2x-3)}}}