find the product of (x-3)(x+3)(x2+9)
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(x-3)(x+3)(x2+9)
=(x^2-9)(x^2+9)
=x^4 - 9^2
= x^4 - 81
=(x^2-9)(x^2+9)
=x^4 - 9^2
= x^4 - 81
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