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    				| 1. | If a ∈ Z and the equation (x – a)(x – 10) +1 = 0 has integral roots, then the values of a are(a) 10, 8(b) 12, 10(c) 12, 8(d) None of these | 
| Answer» Correct option (c) 12, 8 Explanation: ⇒ (x – a)(x – 10) = – 1 x – a = 1 & x – 10 = –1 OR x – a = –1 & x – 10 =1 9 – a = 1 x = 10 – 1 11 – a = – 1 x = 11 a = 8 x = 9 a =12 | |