2 and 3 - 2/ 5 and 1/ 2 Q 15 If x is an irrational number .What can you say about the number x2 ? Support your answer with examples . Topic : Polynomials Q1 If x + 1/x = 5 then x2 + 1/x2 = 25 10 23 27 Q2 (a b)3 + (b c)3 + (c a)3 = – – – (a + b + c (a2 + b2 + c2 a b b c c a) – – – (a b) (b c (c a) – – – 3 (a b) (b c) (c a) – – – None of these Q3 75 X 75 + 2 X 75X 25 + 25 X 25 is equal to 10000 6250 7500 3750 Q4 The value of is 2 3 2.327 2.273 Q5 If x 3 is a factor of x2 x 15 then a = – –a – -2 5 -5 3
2 and 3 - 2/ 5 and 1/ 2 Q 15 If x is an irrational number .What can you say about the number x2 ? Support your answer with examples . Topic : Polynomials Q1 If x + 1/x = 5 then x2 + 1/x2 = 25 10 23 27 Q2 (a – b)3 + (b – c)3 + (c – a)3 = (a + b + c (a2 + b2 + c2 – a b – b c – c a) (a – b) (b – c (c – a) 3 (a – b) (b – c) (c – a) None of these Q3 75 X 75 + 2 X 75X 25 + 25 X 25 is equal to 10000 6250 7500 3750 Q4 The value of is 2 3 2.327 2.273 Q5 If x – 3 is a factor of x2 –a x – 15 then a = -2 5 -5 3
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