Factorise: a4 - 8a2b2 + 16b4 -256. – InterviewSolution

1.

Factorise: a4 - 8a2b2 + 16b4 -256.

Answer»

a*a*a*a-2*4a*a*b*b+4b*b*4*b*b-16*16 =(a*a-4b*b)(a*a-4b*b)-16*16 =(a*a-16-4b*b)(a*a+16-4b*b)

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