已知m+n=2,mn=1,求m³n+mn³+2m²n²的值
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/06 18:32:09
已知m+n=2,mn=1,求m³n+mn³+2m²n²的值
已知m+n=2,mn=1,求m³n+mn³+2m²n²的值
已知m+n=2,mn=1,求m³n+mn³+2m²n²的值
m³n+mn³+2m²n²
=mn(m²+n²+2mn)
=mn(m+n)²
=1×2²
=4
m³n+mn³+2m²n²
=mn(m²+2mn+n²)
=mn(m+n)²
=1*4
=4
m³n+mn³+2m²n²
=mn(m²+n²+2mn)
=mn(m+n)²
=1*2²
=4