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Factorisation of Polynomials — Maths STD 9 — Question

Gujarat BoardEnglish MediumSTD 9MathsFactorisation of Polynomials2 Marks
Question
Factorise:
16x4 - 1
✓

Answer

16x4 - 1
= (4x2)2 - (1)2
= (4x2 - 1)(4x2 + 1)
= [(2x)2 - (1)2](4x2 + 1)
= (2x - 1)(2x + 1)(4x2 + 1) 

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