x^4*y^4-81因式分解

分类: 作业答案 • 2022-01-24 13:01:25

问题描述：

x^4*y^4-81因式分解

答

x^4*y^4-81
=(x²y²)²-9²
=(x²y²+9)(x²y²-9)
=(x²y²+9)(xy+3)(xy-3)