已知|a-2|+(b-1)²+|c|=0,求a²-2ab-5a²+12ac+3ab-c²-8ac-2a²的值
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![已知|a-2|+(b-1)²+|c|=0,求a²-2ab-5a²+12ac+3ab-c²-8ac-2a²的值](/uploads/image/z/2582139-3-9.jpg?t=%E5%B7%B2%E7%9F%A5%7Ca-2%7C%2B%28b-1%29%26%23178%3B%2B%7Cc%7C%3D0%2C%E6%B1%82a%26%23178%3B-2ab-5a%26%23178%3B%2B12ac%2B3ab-c%26%23178%3B-8ac-2a%26%23178%3B%E7%9A%84%E5%80%BC)
已知|a-2|+(b-1)²+|c|=0,求a²-2ab-5a²+12ac+3ab-c²-8ac-2a²的值
已知|a-2|+(b-1)²+|c|=0,求a²-2ab-5a²+12ac+3ab-c²-8ac-2a²的值
已知|a-2|+(b-1)²+|c|=0,求a²-2ab-5a²+12ac+3ab-c²-8ac-2a²的值
|a-2|+(b-1)²+|c|=0,
则,a=2,b=1,c=0
a²-2ab-5a²+12ac+3ab-c²-8ac-2a²
= -6a²+ab+4ac-c²
=-6×2²+2×1+4×1×0-0²
=-24+2+0-0
= -22