Question: 2 6. Let t = - 3-V5 (a) Evaluate the following expressions. (i) t+ - (ii) 1 2 - t (5 marks) (b) Hence, or

2 6. Let t = - 3-V5 (a) Evaluate the following expressions. (i) t+ - (ii) 1 2 - t (5 marks) (b) Hence, or otherwise, show that t is a root of the equation x2 - 3x +1=0, (ii) t is a root of the equation x4 - x' -4x -x+1=0. (4 marks)

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