Answer 1

It is given that f: R → R is defined as f(x) = x² − 3x + 2.

`f(f(x)) = f(x^2 - 3x + 2)`

`= (x^2 +3x + 2)^2 - 3(x^2 - 3x + 2) + 2`

= `x^4 + 9x^2 + 4 - 6x^2 - 12x + 4x^2 - 3x^2 + 9x  -  6 + 2`

`= x^4 - 6x^2 + 10x^2 - 3x`