已知xy²=-2,求-xy(x²y的五次方-xy³-y)的值
来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/29 19:43:27
已知xy²=-2,求-xy(x²y的五次方-xy³-y)的值已知xy²=-2,求-xy(x²y的五次方-xy³-y)的值已知xy²
已知xy²=-2,求-xy(x²y的五次方-xy³-y)的值
已知xy²=-2,求-xy(x²y的五次方-xy³-y)的值
已知xy²=-2,求-xy(x²y的五次方-xy³-y)的值
-xy(x²y的五次方-xy³-y)
=-x³y^6+x²y^4+xy²
=-(xy²)³+(xy²)²+xy²
=-(-2)³+(-2)²+(-2)
=-8+4-2
=-6