a. Simplify (1 + t) 3 (1 t) 3 . b. Show that x 3
Question:
a. Simplify (1 + t)3 − (1 − t)3.
b. Show that x3 − y3 = (x − y)(x2 + xy + y2).
c. Substitute x = 1 + t and y = 1 − t in the result in part b and show that your answer is the same as that for part a.
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a 1 t3 1 t3 1 3t 3t2 t3 1 3t 3t2 t3 6t2 b x3 y3 x yx2 xy y2 Ex...View the full answer
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Related Book For
Cambridge IGCSE And O Level Additional Mathematics
ISBN: 9781510421646
1st Edition
Authors: Val Hanrahan, Jeanette Powell
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