因式分解(x-3)(x+3)(x-4)(x+4)-120x²
问题描述:
因式分解(x-3)(x+3)(x-4)(x+4)-120x²
【要有过程】
答
答:
(x-3)(x+3)(x-4)(x+4)-120x²
=(x²-9)(x²-16)-120x²
=x^4-25x²+144-120x²
=x^4-145x²+144
=(x²-1)(x²-144)
=(x-1)(x+1)(x-12)(x+12)