作业帮计算 [(x-y)²+(x+y)²](x²-y²)
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/29 23:17:49
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计算 [(x-y)²+(x+y)²](x²-y²)
计算 [(x-y)²+(x+y)²](x²-y²)
计算 [(x-y)²+(x+y)²](x²-y²)
[(x-y)²+(x+y)²](x²-y²) =(x²-2xy+y²+x²+2xy+y²)(x²-y²)
=2(x²+y²)(x²-y²)
=2(x⁴-y⁴)
=2x⁴-2y⁴
=2(x²-y²) ²
