计算: 1)(a^2-1)/(-a)·(2ab^2)/(a^2-2a+1) 2)(x^2-3x)/(x+2)÷(x-3)/(x^2-4)
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/28 04:12:05
计算:1)(a^2-1)/(-a)·(2ab^2)/(a^2-2a+1)2)(x^2-3x)/(x+2)÷(x-3)/(x^2-4)计算:1)(a^2-1)/(-a)·(2ab^2)/(a^2-2a+
计算: 1)(a^2-1)/(-a)·(2ab^2)/(a^2-2a+1) 2)(x^2-3x)/(x+2)÷(x-3)/(x^2-4)
计算: 1)(a^2-1)/(-a)·(2ab^2)/(a^2-2a+1) 2)(x^2-3x)/(x+2)÷(x-3)/(x^2-4)
计算: 1)(a^2-1)/(-a)·(2ab^2)/(a^2-2a+1) 2)(x^2-3x)/(x+2)÷(x-3)/(x^2-4)
1)(a^2-1)/(-a)·(2ab^2)/(a^2-2a+1)
=(a+1)(a-1)·(-2b^2)/(a-1)^2
=-2b^2(a+1)/(a-1)
2)(x^2-3x)/(x+2)÷(x-3)/(x^2-4)
=x(x-3)/(x+2)*(x+2)(x-2)/(x-3)
=x(x-2)
=x^2-2x
楼上是正解
计算 a^2/1+a+1-a
(a+1)(a+2)(a-3)计算
计算:a^2×(-a)^2×(-a)^3(-ab)^2·(2a^2-ab-1)
计算:[a-(1/a)]/a^2-2a+1/a
计算:(2a+3)(a²+a-1)
计算:-2a(a²b+a-1)
计算(a^2+a+1)/(a+1)-(a^2-3a+1)/(a-3)
计算:-a³(a²-a-1)+a(-a³+2a).
计算:a²(a-1)-2a(1/2a²-1/2a+1).
计算1-(a-1)/a÷[a/(a+2)-1/(a2+2a)]等于?
计算:2a-(a-1)+a^2-1/a+1;
计算:a+1/a-1+a-2/1-a
计算4a /(a^2-1)+(1+a)/(1-a)
计算a-1/a÷(a-1/a)=
计算/1-a/+/2a+1/+/a/ (a
计算(a+1)(a+2)(a+3)(a-6)
计算(a三次方-a)/(a²+2a+1)
计算,(a+3)(a-1)+a(a-2)