已知m+n=2,mn=1,求m³n+mn³+2m²n²的值
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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](/uploads/image/z/2146830-6-0.jpg?t=%E5%B7%B2%E7%9F%A5m%2Bn%3D2%2Cmn%3D1%2C%E6%B1%82m%26%23179%3Bn%2Bmn%26%23179%3B%2B2m%26%23178%3Bn%26%23178%3B%E7%9A%84%E5%80%BC)
m³n+mn³+2m²n²
=mn(m²+n²+2mn)
=mn(m+n)²
=1×2²
=4
=mn(m²+n²+2mn)
=mn(m+n)²
=1×2²
=4
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