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!

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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+

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