化简 2a(1+x%)²-a(1-x%)²
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/27 21:57:26
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化简 2a(1+x%)²-a(1-x%)²
化简 2a(1+x%)²-a(1-x%)²
化简 2a(1+x%)²-a(1-x%)²
2a(1+x%)²-a(1-x%)²
=2a(1+2x%+x%²)-a(1-2x%+x%²)
=2a+4ax%+2ax%²-a+2ax%-ax%²
=ax%²+6ax%+a
不懂的欢迎追问,
2a(1+x%)²-a(1-x%)²
=a[2+4x%+2(x%)²-1+2x%-(x%)²]
=a[1+6x%+(x%)²]