Describe the x-values at which the function is differentiable. x² x²-9 y= y The function is differentiable for all x # +9. The function is differentiable for all -3 < x < 3. The function is differentiable for all x # £3. O The function is differentiable for all x < -3 or 3 < x. The function is differentiable for all x-values.

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