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64(x+y)*2-16(x-y)*2 分解因式
人气:453 ℃ 时间:2020-04-29 02:59:04
解答
64(x+y)^2-16(x-y)^2
=16[4(x+y)^2-(x-y)^2]
=16[2(x+y)+(x-y)][2(x+y)-(x-y)]
=16(3x+y)(x+3y)
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