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Solve X2 – 4x – 12 =0; When X ∈ I - ICSE Class 10 - Mathematics

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Question

Solve x2 – 4x – 12 =0; when x ∈ I

Solution

x2 – 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.
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