(x+2)²-16(x-y)²
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/10 07:34:50
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(x+2)²-16(x-y)²
(x+2)²-16(x-y)²
(x+2)²-16(x-y)²
(x+2)²-16(x-y)²
=[(x+2)+4(x-y)][x+2-4(x-y)]
=(5x+4y+2)(4y-3x+2)
(x+2)²-4²(x-y)²
=(x+2+4x-4y)(x+2-4x+4y)
=(5x-4y+2)(4y-3x+2)
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