It is (x-1)(x-1) when factored
That expression can not be factored.
It is: (x+1)(x+12) when factored
x2 + 6x + 5 can be factored into (x+1) (x+5)
It is a quadratic expression and when factored is: (x+1)(x+1)
x2+6x-7 = (x+7)(x-1) when factored
It is: (x+1)(x+6) when factored
x2+5x-6 = (x+6)(x-1) when factored
x2-5x+4 = (x-1)(x-4) when factored
When factored it is: (x+9)(x-1)
x^2 +7x+6 = (x+1)(x+6) when factored
If you mean: x2+3x+2 then it is (x+1)(x+2) when factored