1/2(x²-y)+1/3(x-y)²+1/6(x²+y²)

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1/2(x²-y)+1/3(x-y)²+1/6(x²+y²)

1/2(x²-y)+1/3(x-y)²+1/6(x²+y²)
1/2(x²-y)+1/3(x-y)²+1/6(x²+y²)

1/2(x²-y)+1/3(x-y)²+1/6(x²+y²)
是一道化简题
原式=1/2x²-1/2y+1/3(x²-2xy+y²)+1/6x²+1/6y²
=x²-1/2y-2/3xy+1/2y²