Question

Factor x² - 4x + 5.

A Prime
B (x + 5)(x - 1)
C (x - 5)(x - 1)
D (x + 5)(x + 1)

Answer 1

`\huge\boxed{\sf Option \ A}`

Explanation:

Given expression:

= x² - 4x + 5

We can not factor out this expression, because of we apply mid-term break to it, the factors -4x will break into are -5x + x the coefficients of which when multiplied give -5 and not +5 (side term). This is a known rule in the mid-term break formula.

• So, the given expression is a prime expression.

`\rule[225]{225}{2}`