作业帮化简求值题及答案,类似|a+1|+（b-2）=0,求2a^2-[8ab+2\1（ab-4a^2）]-2\1ab的值!就要这样的!
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/30 01:05:45
![化简求值题及答案,类似|a+1|+（b-2）=0,求2a^2-[8ab+2\1（ab-4a^2）]-2\1ab的值!就要这样的!](/uploads/image/z/12620325-21-5.jpg?t=%E5%8C%96%E7%AE%80%E6%B1%82%E5%80%BC%E9%A2%98%E5%8F%8A%E7%AD%94%E6%A1%88%2C%E7%B1%BB%E4%BC%BC%7Ca%2B1%7C%2B%EF%BC%88b-2%EF%BC%89%3D0%2C%E6%B1%822a%5E2-%5B8ab%2B2%5C1%EF%BC%88ab-4a%5E2%EF%BC%89%5D-2%5C1ab%E7%9A%84%E5%80%BC%21%E5%B0%B1%E8%A6%81%E8%BF%99%E6%A0%B7%E7%9A%84%21)
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化简求值题及答案,类似|a+1|+（b-2）=0,求2a^2-[8ab+2\1（ab-4a^2）]-2\1ab的值!就要这样的!
化简求值题及答案,类似|a+1|+（b-2）=0,求2a^2-[8ab+2\1（ab-4a^2）]-2\1ab的值!
就要这样的!
化简求值题及答案,类似|a+1|+（b-2）=0,求2a^2-[8ab+2\1（ab-4a^2）]-2\1ab的值!就要这样的!
|a+1|+（b-2）=0
a+1=0 a=-1
b-2=0 b=2
2a^2-[8ab+1/2（ab-4a^2）]-1/2ab
=2a^2-8ab-1/2ab+2a^2-1/2ab
=4a^2-9ab
=4×1-9×（-1）×2
=4+18
=22