a. Expand (1 + x) 3 . b. Use your answer to part a to express: i.
Question:
a. Expand (1 + x)3.
b. Use your answer to part a to express:
i. (1 + √5 )3 in the form a + b√5
ii. (1 − √5 )3 in the form c + d√5.
c. Use your answers to part b to simplify (1 + √5)3 + (1 − √5)3.
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Step by Step Answer:
a Using the binomial theorem we can expand 1 x3 as foll...View the full answer
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Related Book For 
Cambridge International AS And A Level Mathematics Pure Mathematics 1 Coursebook
ISBN: 9781108407144
1st Edition
Authors: Sue Pemberton, Julian Gilbey
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