计算 8(y-x)²+2(x-y)²
问题描述:
计算 8(y-x)²+2(x-y)²
答
8(y-x)²+2(x-y)²
=8[-(x-y)]²+2(x-y)²
=8(x-y)²+2(x-y)²
=10(x-y)²
=10(x²-2xy+y²)
=10x²-20xy+10y²
答
8(y-x)²+2(x-y)²
=8(x-y)²+2(x-y)²
提一个10
=10(x-y)²
有什么不懂可以追问
答
8(y-x)²+2(x-y)²
=8(x-y)²+2(x-y)²
=10(x-y)²
答
您好:
8(y-x)²+2(x-y)²
=8(x-y)²+2(x-y)²
=10(x-y)²
=10x²-20xy+10y²
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