81·x的5次方y的5次方-xy ·是乘号,因式分解

问题描述:

81·x的5次方y的5次方-xy ·是乘号,因式分解

81·(x·y)^5-xy
=x·y(81x^4·y^4-1)
=x·y(9x²y²+1)(9x²y²-1)
=x·y(9x²y²+1)(3xy+1)(3xy-1)
过程够详细
满意?
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