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
10, 8
b
12, 10
c
12, 8
d
none of these
answer is C.
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Detailed Solution
Since a and x are integers. Therefore, (x−a)(x−10)+1=0⇒ (x−a)(x−10)=−1⇒ (x−a=1 and x−10=−1) or, (x−a=−1 and x−10=1)⇒ (x=9 and a=8) or, (x=11 and a=12)⇒ a=8 or, a=12