Question

How do you factor the trinomial `0 = x² + 4x + 3`?

Answer 1

(x + 1)(x + 3)

Explanation:

`x^2 + 4x + 3 = 0`
Since a - b + c = 0, use shortcut.
Two real roots are: -1 and `-c/a = -3`.
Two factors are: (x + 1) and (x + 3)
y = (x + 1)(x + 3)