计算:8/9(x+2)(x+2)-2(y-1)(y-1),

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计算:8/9(x+2)(x+2)-2(y-1)(y-1),计算:8/9(x+2)(x+2)-2(y-1)(y-1),计算:8/9(x+2)(x+2)-2(y-1)(y-1),8/9(x+2)(x+2)

计算:8/9(x+2)(x+2)-2(y-1)(y-1),
计算:8/9(x+2)(x+2)-2(y-1)(y-1),

计算:8/9(x+2)(x+2)-2(y-1)(y-1),
8/9(x+2)(x+2)-2(y-1)(y-1)
=8/9(x²-4)-2(y²-1)
=8/9x²-32/9-2y²+2
=8/9x²-2y²-14/9