已知丨a+b-1丨+(a-b-3)²=0,求3a²(a³b²-2a)-4a(-a
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已知丨a+b-1丨+(a-b-3)²=0,求3a²(a³b²-2a)-4a(-a²b)²的值
![已知丨a+b-1丨+(a-b-3)²=0,求3a²(a³b²-2a)-4a(-a](/uploads/image/z/15741179-35-9.jpg?t=%E5%B7%B2%E7%9F%A5%E4%B8%A8a%2Bb-1%E4%B8%A8%2B%EF%BC%88a-b-3%EF%BC%89%26%23178%3B%3D0%2C%E6%B1%823a%26%23178%3B%EF%BC%88a%26%23179%3Bb%26%23178%3B-2a%EF%BC%89-4a%EF%BC%88-a)
丨a+b-1丨+(a-b-3)²=0
丨a+b-1丨=0,(a-b-3)²=0
a+b-1=0
a-b-3=0
解得
a=2
b=-1
3a²(a³b²-2a)-4a(-a²b)²
=3a^5b²-6a^3-4a*a^4b²
=3a^5b²-6a^3-4a^5b²
=-6a^3-a^5b²
=-6*2^3-2^5*(-1)²
=-48-32
=-80
丨a+b-1丨=0,(a-b-3)²=0
a+b-1=0
a-b-3=0
解得
a=2
b=-1
3a²(a³b²-2a)-4a(-a²b)²
=3a^5b²-6a^3-4a*a^4b²
=3a^5b²-6a^3-4a^5b²
=-6a^3-a^5b²
=-6*2^3-2^5*(-1)²
=-48-32
=-80
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