Factor polynomial $$ x^{2}-9-y^{2}+6y $$
Answer
$$ x^{2}-9-y^{2}+6y = (x-y+3)(x+y-3) $$
Explanation
$ x^2-9-y^2+6y $ can be written as
$$ x^2-9-y^2+6y = \left( x-y+3 \right) \left( x+y-3 \right)$$The explanation for this step cannot be generated.
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