若|a-1|+(b+2)2=0 求代数式5ab-4a^2b^2-8ab^2+3ab-ab^2+4a^2b^2的值
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![若|a-1|+(b+2)2=0 求代数式5ab-4a^2b^2-8ab^2+3ab-ab^2+4a^2b^2的值](/uploads/image/z/3723417-9-7.jpg?t=%E8%8B%A5%7Ca-1%7C%2B%28b%2B2%292%3D0+%E6%B1%82%E4%BB%A3%E6%95%B0%E5%BC%8F5ab-4a%5E2b%5E2-8ab%5E2%2B3ab-ab%5E2%2B4a%5E2b%5E2%E7%9A%84%E5%80%BC)
若|a-1|+(b+2)2=0 求代数式5ab-4a^2b^2-8ab^2+3ab-ab^2+4a^2b^2的值
若|a-1|+(b+2)2=0 求代数式5ab-4a^2b^2-8ab^2+3ab-ab^2+4a^2b^2的值
若|a-1|+(b+2)2=0 求代数式5ab-4a^2b^2-8ab^2+3ab-ab^2+4a^2b^2的值
因为|a-1|+(b+2)2=0,所以a=1,b=-2,
又因为5ab-4a^2b^2-8ab^2+3ab-ab^2+4a^2b^2=8ab-9ab^2,
所以原式等于8*1*(-2)-9*(1*(-2))^2=-16-36=-52