[1-(6+3a)/(a2+4a+4)]÷[(4a-4)/(a2+2a)]
1个回答
原式=(a²+4a+4-6-3a)/(a²+4a+4)×(a²+2a)/(4a-4)
=(a+2)(a-1)/(a+2)²×a(a+2)/4(a-1)
=a/4
相关问题
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A1(1,1) A2(2,-4) A3(3,4) A4(4,-2) A5(5,7) A6(6,-3/4)A7(7,10)
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