(5x+3)(5x-3)(25x^2-9)
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(5x+3)(5x-3)(25x^2-9)(5x+3)(5x-3)(25x^2-9)(5x+3)(5x-3)(25x^2-9)(5x+3)(5x-3)(25x^2-9)=(25x²-9)(2
(5x+3)(5x-3)(25x^2-9)
(5x+3)(5x-3)(25x^2-9)
(5x+3)(5x-3)(25x^2-9)
(5x+3)(5x-3)(25x^2-9)
=(25x²-9)(25x²-9)
=625x的4次方-450x²+81
(5x+3)(5x-3)(25x^2-9)
=(25x^2-9)(25x^2-9)
=(25x^2-9)^2
=625x^4-450x^2+81
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