Try it on paper first. A hint, the key idea and the worked solution are here when you need them.
Write as the sum of an even function and an odd function.
moves the graph right and up; stretches the heights; and reflect it. Even: . Odd: .
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. Expand. .
Step 2. Sort the powers. Even: . Odd: .
Answer: . Check: gives the even part.
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