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x^4*y^4-81因式分解
人气:227 ℃ 时间:2020-06-20 08:57:39
解答
x^4*y^4-81
=(x²y²)²-9²
=(x²y²+9)(x²y²-9)
=(x²y²+9)(xy+3)(xy-3)
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