It is known that the two square differences of the X equation x & sup2; + 2x + 1-k & sup2; = 0 are equal to 2, and the value of K is obtained

It is known that the two square differences of the X equation x & sup2; + 2x + 1-k & sup2; = 0 are equal to 2, and the value of K is obtained

(x+1+k)(x+1-k)=0