factorize x^2-5x+6
Let's factorize in : x2 -5x + 6
Given the quadratic form ax2 + bx + c, you can calculate the discriminant: Δ = b2 -4ac
Δ = (-5)2 -4·1·6
Δ = 25 -4·6
Δ = 25 -24
Δ = 1
Since Δ > 0, the equation has two solutions:
For the first solution, we obtain: -b -Δ2a
x1 = 5 -12
x1 = 42
x1 = 2
Solution 2nd: -b + Δ2a
x2 = 5 + 12
x2 = 62
x2 = 3
Result:   (x -2)·(x -3)