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分解因式9(x+y)^2-25x^4
人气:276 ℃ 时间:2020-06-03 12:45:49
解答
你好,
9(x+y)²-25x⁴
=[3(x+y)]²-(5x²)²
=[3(x+y)+5x²][3(x+y)-5x²]
=(3x+3y+5x²)(3x+3y-5x²)
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