Algebra and Applications Test 2

Question : 20 of 40

Marks: +1, -0

Solve the following equation

a^2 - a - 6 = 0

, for ‘a’ being a natural number:

Solution:

a^2 - a - 6 = 0

a^2 - 3a + 2a - 6 = 0

a(a - 3) + 2(a - 3) = 0

(a - 3) (a + 2) = 0

a = 3, a = - 2

3 is only the natural number.

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