#### Question

Solve x^{2} – 4x – 12 =0; when x ∈ I

#### Solution

x^{2} – 4x – 12 =0

`=> x^2 - 6x + 2x - 12 = 0`

`=> x(x - 6) + 2(x - 6) = 0`

=> (x - 6)(x + 2) = 0

then x = 6 and x = -2

Since `x in I` then x = 6 and -2

Is there an error in this question or solution?

Solution Solve X2 – 4x – 12 =0; When X ∈ I Concept: Solutions of Quadratic Equations by Factorization.