(2) (Total 6 marks) 7. (a) Rationalise ..................................... (2) (b) (i) Expand and simplify (3 + 15)2 Give your answer in the form + where and n m5, n m are integers. ..................................... (ii) All measurements on the triangle are in centimetres. is a right-angled triangle. ABC is a positive integer. k Find the value of k.
(2) (Total 6 marks) 7. (a) Rationalise ..................................... (2) (b) (i) Expand and simplify (3 + 15)2 Give your answer in the form n + m5, where n and m are integers. ..................................... (ii) All measurements on the triangle are in centimetres. ABC is a right-angled triangle. k is a positive integer. Find the value of k.