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# Solve : X2 – 11x – 12 =0; When X ∈ N - ICSE Class 10 - Mathematics

ConceptSolutions of Quadratic Equations by Factorization

#### Question

Solve : x2 – 11x – 12 =0; when x ∈ N

#### Solution

x2 – 11x – 12 =0

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

=> x(x - 12) + 1(x - 12) = 0

=> (x - 12)(x + 1) = 0

then x = 12 and x = -1

Since x in N then x = 12

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#### APPEARS IN

Solution Solve : X2 – 11x – 12 =0; When X ∈ N Concept: Solutions of Quadratic Equations by Factorization.
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