(5x+3)(5x-3)(25x^2-9)
问题描述:
(5x+3)(5x-3)(25x^2-9)
答
(5x+3)(5x-3)(25x^2-9)
=(25x^2-9)(25x^2-9)
=(25x^2-9)^2
=625x^4-450x^2+81
答
(5x+3)(5x-3)(25x^2-9)
=(25x²-9)(25x²-9)
=625x的4次方-450x²+81