七下几道数学题,超急的①(a²-4)÷(a+2)=②(x²+2xy+y²)÷(x+y)=③
7个回答
a-2
x+y
a-b-2
x=0或x=2
x=-1或x=1/3
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三道初二数学题,求解答;计算;(4x² - y²)÷ (4x²- 4xy +y²)/2x-y因式分解 4(a-b)² -
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