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因式分解x²+8xy-8y²
人气:105 ℃ 时间:2020-05-15 12:33:52
解答
x²+8xy-8y²
=x²+2×4xy+(4y)²-(4y)²-8y²
=(x+4y)²-24y²
=(x+4y+2√6y)(x+4y-2√6y)
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