Answer:
-4y
Step-by-step explanation:
This is a piecewise function, so we'll need to simplify each part separately.
When y < 0, we can simplify the radical by writing it as -√16y². The final result is -√16y² if y < 0.
That's it! Piecewise functions may be a bit tricky at first, but they just require careful attention to the conditions and values.
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