(iii) x4+64 – InterviewSolution

1.

(iii) x4+64

Answer»

x4+ 64 =x4+ 16x2- 16x2+ 64x4+ 16x2- 16x2+ 64 =x4+ 16x2+ 64 - 16x2x4+ 16x2+ 64 - 16x2

= (x2+ 8)(x2+ 8) - (4x)2= (x2+ 8)2- (4x)2(x2+ 8)2- (4x)2= (x2+ 8 + 4x)(x2+ 8 - 4x),

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