-1/2a-2(a-1/2b²)-(3/2a-1/3b²)其中a=-2,b=2/3 先化简,在求值
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/22 12:11:06
![-1/2a-2(a-1/2b²)-(3/2a-1/3b²)其中a=-2,b=2/3 先化简,在求值](/uploads/image/z/1072733-5-3.jpg?t=-1%2F2a-2%28a-1%2F2b%26sup2%3B%29-%283%2F2a-1%2F3b%26sup2%3B%29%E5%85%B6%E4%B8%ADa%3D-2%2Cb%3D2%2F3+%E5%85%88%E5%8C%96%E7%AE%80%2C%E5%9C%A8%E6%B1%82%E5%80%BC)
-1/2a-2(a-1/2b²)-(3/2a-1/3b²)其中a=-2,b=2/3 先化简,在求值
-1/2a-2(a-1/2b²)-(3/2a-1/3b²)其中a=-2,b=2/3 先化简,在求值
-1/2a-2(a-1/2b²)-(3/2a-1/3b²)其中a=-2,b=2/3 先化简,在求值
-1/2a-2(a-1/2b²)-(3/2a-1/3b²)
=-1/2a-2a+b²-3/2a+1/3b²
=-4a+4/3b^2
=-4×(-2)+4/3×(2/3)^2
=8+16/27
=8又16/27