计算或化简;(1)((a+3)\(a^2-4)-a\(a^2+a-6))÷(4a+9)\(a^2-4)(2)(x^2-5x+6)\(3x^2-3)÷(1-3\(x+1))×(1+2\(x-3)) (3)(1-1\(x-1))(x\(x+1)+1)÷(1-3x^2\(1-x^2))
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计算或化简;(1)((a+3)\(a^2-4)-a\(a^2+a-6))÷(4a+9)\(a^2-4)(2)(x^2-5x+6)\(3x^2-3)÷(1-3\(x+1))×(1+2\(x-3)) (3)(1-1\(x-1))(x\(x+1)+1)÷(1-3x^2\(1-x^2))
计算或化简;(1)((a+3)\(a^2-4)-a\(a^2+a-6))÷(4a+9)\(a^2-4)
(2)(x^2-5x+6)\(3x^2-3)÷(1-3\(x+1))×(1+2\(x-3)) (3)(1-1\(x-1))(x\(x+1)+1)÷(1-3x^2\(1-x^2))
计算或化简;(1)((a+3)\(a^2-4)-a\(a^2+a-6))÷(4a+9)\(a^2-4)(2)(x^2-5x+6)\(3x^2-3)÷(1-3\(x+1))×(1+2\(x-3)) (3)(1-1\(x-1))(x\(x+1)+1)÷(1-3x^2\(1-x^2))
观察分式的上面分母和下面的分母
a^2-4=(a+2)(a-2)
a^2+a-6=(a+3)(a-2)
约去(a-2)
分式的上面通分=(4a+9)/(a+2)(a+3)
与下面的相同的约去=1/(a+3)
计算或化简:(-a+b)^3
(化简或计算)1+[4/(a^2-4)] 除以 [a/(a+2)]
(a+3)(a-1)+a(a+2)化简计算,
计算或化简:(a-b+c)^2
计算或化简:[(2a+2)/(a-1)]÷(a+1)-[(a²-1)/(a²-2a+1)]
计算或化简(x-1)(x-2)-(2-x)^2(a+b-c)(c+a+b)-(a+b)^
计算或化简(-a)^3·a·(-a)^4
求计算或化简2道题求计算或化简(x+1-3/(x-1))÷(x+2)/(2x-2)a+b+2b^2/a-b
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计算a^3*(1/a)^2