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Q.

If a ∈ z and the equation (x - a)(x - 10) + 1 = 0 has integral roots, then the values of "a" are

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a

12, 6 

b

12, 8

c

10, 8

d

12, 10

answer is B.

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Detailed Solution

If x - a = 1 & (x - 10) = -1 then a = 8
If x - a = -1 & (x - 10) = 1 then a = 12

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