factorise this .................!
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(x power 4)-(9 power 4)
(x power 2-9)(x power + 9)
(x-3)(x+3)(x power +9)
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Answer:
(x power 4)-(9 power 4)
(x power 2-9)(x power + 9)
(x-3)(x+3)(x power +9)
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