![](https://iknow-base.cdn.bcebos.com/lxb/notice.png)
解答下面问题
已知丨a+五分之三丨+(b-五分之二)²=0,求a³-2[4a²b+3(a³-3a²b)]的值...
已知丨a+五分之三丨+(b-五分之二)²=0,求a³-2[4a²b+3(a³-3a²b)]的值
展开
2个回答
展开全部
已知丨a+五分之三丨+(b-五分之二)²=0,
丨a+五分之三丨=0, a= -3/5
(b-五分之二)²=0, b=2/5
a³-2[4a²b+3(a³-3a²b)]
=10a²b-5a³
=a²(10b-5a)
=( -3/5)²*(10*2/5-5*(-3/5))
=9/25*(4+3)
=63/25
丨a+五分之三丨=0, a= -3/5
(b-五分之二)²=0, b=2/5
a³-2[4a²b+3(a³-3a²b)]
=10a²b-5a³
=a²(10b-5a)
=( -3/5)²*(10*2/5-5*(-3/5))
=9/25*(4+3)
=63/25
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询