百度作业网(a-1/2)[(a+1/2b)²-(a-1/2b)²]﹙a²+1/2ab+b²
来源：学生作业帮 编辑：百度作业网作业帮 分类：数学作业 时间：2024/04/30 00:55:31
(a-1/2)[(a+1/2b)²-(a-1/2b)²]﹙a²+1/2ab+b²﹚-2b﹙a⁴-1﹚
化简，a=2，b=-1
化简，a=2，b=-1
![(a-1/2)[(a+1/2b)²-(a-1/2b)²]﹙a²+1/2ab+b²](/uploads/image/z/18449066-2-6.jpg?t=%28a-1%2F2%29%5B%28a%2B1%2F2b%29%26%23178%3B-%28a-1%2F2b%29%26%23178%3B%5D%EF%B9%99a%26%23178%3B%2B1%2F2ab%2Bb%26%23178%3B)
(a-1/2)[(a+1/2b)²-(a-1/2b)²]﹙a²+1/2ab+b²﹚-2b﹙a⁴-1﹚
=(a-1/2)*2ab﹙a²+1/2ab+b²﹚-2b﹙a⁴-1﹚
请检查题目
再问： 打错了。是 (a-1/2b)[(a+1/2b)²-(a-1/2b)²]﹙a²+1/2ab+b²﹚-2b﹙a⁴-1﹚ 写出详细过程
再答： (a-1/2b)[(a+1/2b)²-(a-1/2b)²]﹙a²+1/2ab+b²﹚-2b﹙a⁴-1﹚ =2ab[a^3-(1/4)ab^+ab^-(1/2)b^3]-2b(a^4-1) =(3/2)a^b^3-ab^4+2b, a=2，b=-1时原式=-6-2-2=-10.
=(a-1/2)*2ab﹙a²+1/2ab+b²﹚-2b﹙a⁴-1﹚
请检查题目
再问： 打错了。是 (a-1/2b)[(a+1/2b)²-(a-1/2b)²]﹙a²+1/2ab+b²﹚-2b﹙a⁴-1﹚ 写出详细过程
再答： (a-1/2b)[(a+1/2b)²-(a-1/2b)²]﹙a²+1/2ab+b²﹚-2b﹙a⁴-1﹚ =2ab[a^3-(1/4)ab^+ab^-(1/2)b^3]-2b(a^4-1) =(3/2)a^b^3-ab^4+2b, a=2，b=-1时原式=-6-2-2=-10.
计算：a/b(a-b)-b/a(a-b)；（1/a+1/b）÷a²+2ab+b²/a+b.
分解因式 -a³+a²b-(1/4)ab² -2a(a+b)+b(a+b)
化简 b²-a²/a²-ab÷（a+(2ab+b²/a))·(1/a+1/b)
化简 (a+b)²+2a(a-1/2b)-3(a-b)(a+b)
已知：a-b=1,求a²-2ab+b²-a+b的值
1-a-b/a+2b÷a²-b²/a²+4ab+4b²
已知A=a²-2ab+b²,B=a²+2ab+b²求A+B;求1/4(B-A);
计算:[a-b分之4ab+(b分之a-a分之b)÷a分之1+b分之1)]÷(a²+2ab+b²)
【4ab/(a-b)+(a/b-b/a)÷(1/a+1/b)】÷(a²+2ab+b²)化简
先化简再求值 （a-2b)(a²+2ab+4b²）-a(a-5b)(a+3b),其中a=-1,b=2
1、已知B-A=4ab A=a²-2ab+b² 求B+A 2、已知 A=a²-2ba,B=
a(a-2b)+2(a+b)(a-b)+(a+b)²,其中a=-½,b=1