化简:3(a+1)^2-(a+1)(2a+4)
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化简:3(a+1)^2-(a+1)(2a+4)
化简:3(a+1)^2-(a+1)(2a+4)
化简:3(a+1)^2-(a+1)(2a+4)
3a^2+3+6a-2a^2-2a-4a-4 =a^2-1
原式=(3a+3)(a+1)-(a+1)(2a+4) =(a+1)(3a+3-2a-4) =(a+1)(a-1) =a-1
(通分) a/a^a^a+3a+2 ,a/a^a+2a+1 ,-1/3a+6
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计算(a^2+a+1)/(a+1)-(a^2-3a+1)/(a-3)
化简:(a+1)(a-3)-(a-2) ^2
化简(a^3-a)(a^2+1)等于多少?
化简:3a-[5a-(2a-1)]=
化简:(a/a²)-(2a+1/3-a)+(2-a/9-a²)sorry,(a/a²-2a)+(1/3-a)/(2-a/9-a²)
[a/(a-1)+a/(a+2)](a+2)/(2a平方+3a+1)化简
(a 1)(a 2)(a 3)(a
(a+2)(a+1)-a(a-3)
求和:1,a+a^2,a^3+a^4+a^5,a^6+a^7+a^8+a^9,···(a不等于0)
(2a+3/a^2+1)-(a+3/a^2+1)*(2a^2+6a/a^2+6a+9)化简
已知a小于1,化简【a的平方-3a+2/a的平方-6a+9】*a-3/【2-a】+【1-a】(【 】为根号,*为乘)
化简:(2a+1/a²-1)*a²-2a+1/a²-a-(1/a+1)
化简[a^2+a/a^2-1+(a^2-a分之根号下a^2-2a+1)
化简:(a-a/a+1)÷(a²-2a)/(a²-4)×1/(a+2)
化简(a+1)(a-2)/(a+2)(a-2)+3