计算【4(x+y)²-x-y】÷(x+y)
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计算【4(x+y)²-x-y】÷(x+y)计算【4(x+y)²-x-y】÷(x+y)计算【4(x+y)²-x-y】÷(x+y)原式=[4(x+y)²-(x+y)
计算【4(x+y)²-x-y】÷(x+y)
计算【4(x+y)²-x-y】÷(x+y)
计算【4(x+y)²-x-y】÷(x+y)
原式=[4(x+y)²-(x+y)]÷(x+y)
=(x+y)[4(x+y)-1]÷(x+y)
=4(x+y)-1
=4x+4y-1