Sustituiremos la funciónf en sí misma por cadax. \[\begin{array}{rl}(f\circ f)(x)=f(f(x))&\text{Replace }f(x)\text{ with }x^2-x \\ (f\circ f)(x)=f\underset{f(x)}{\underbrace{\color{blue}{(x^2-...Sustituiremos la funciónf en sí misma por cadax. \[\begin{array}{rl}(f\circ f)(x)=f(f(x))&\text{Replace }f(x)\text{ with }x^2-x \\ (f\circ f)(x)=f\underset{f(x)}{\underbrace{\color{blue}{(x^2-x)}}}&\text{Replace the variables in }f\text{ with }(x^2-x) \\ (f\circ f)(x)=(\color{blue}{x^2-x}\color{black}{})^2-(\color{blue}{x^2-x}\color{black}{})&\text{Simplify} \\ (f\circ f)(x)=x^4-2x^3+x^2-x^2+x&\text{Combine like terms} \\ (f\circ f)(x)=x^4-2x^3+x&f\text{ composed with itself}\end{array}…
