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Question
Factorise the following:
x5 – 16x
Sum
Solution
x5 – 16x = x[x4 – 16] ...[a2 – b2 = (a + b) (a – b)]
= x[(x2)2 – 42]
= x(x2 + 4)(x2 – 4)
= x(x2 + 4)(x2 – 22)
= x(x2+ 4)(x + 2)(x – 2)
shaalaa.com
Factorisation Using Identity a2 - b2 = (a + b)(a - b)
Is there an error in this question or solution?
Chapter 3: Algebra - Exercise 3.5 [Page 105]
