Example QEQ.0 : Suppose $f(x)=2(x-1)^2 - 8 = 0$. Find $x$.
The function $f$ is best understood as the composition of the four core functions  $f_{-8}∘f_{∗2}∘q∘f_{−1}$.
Draw a mapping diagram yourself or  use the diagram created with GeoGebra to explore the diagram further.

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