Question

Factor x2 - 4x + 5.
Prime
(x + 5)(x - 1)
(X - 5)(x - 1)
(x + 5)(x + 1)

Answer 1

Prime.

$x^2-4x+5$

The equation cannot be factored.

Let's expand the options:

$(x + 5)(x - 1)=x^2+4x-5$

$(x - 5)(x - 1)=x^2-6x+5$

$(x + 5)(x + 1)=x^2+6x+5$

None of the answers match.

Therefore, if the expression cannot be factored it is said to be prime