Question

if f(x) =x²-1 then find fof​

Answer 1

Answer:

fof (x4 – 2x2)

= f(f(x4 – 2x2))

= (x4 – 2x2)2 – 1

= x8 – 4x6 + 4x4 –1

Answer 2

Answer:

x⁴+2x²+2

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