已知实数a、b满足 |a+1/2|+(2b-4)²=0,求-ab²的值.已知实数a、b满足 |a+1/2|+(2b-4)²=0,求-ab²的值.

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已知实数a、b满足|a+1/2|+(2b-4)²=0,求-ab²的值.已知实数a、b满足|a+1/2|+(2b-4)²=0,求-ab²的值.已知实数a、b满足|

已知实数a、b满足 |a+1/2|+(2b-4)²=0,求-ab²的值.已知实数a、b满足 |a+1/2|+(2b-4)²=0,求-ab²的值.
已知实数a、b满足 |a+1/2|+(2b-4)²=0,求-ab²的值.
已知实数a、b满足 |a+1/2|+(2b-4)²=0,求-ab²的值.

已知实数a、b满足 |a+1/2|+(2b-4)²=0,求-ab²的值.已知实数a、b满足 |a+1/2|+(2b-4)²=0,求-ab²的值.
因为绝对值一定是正数,一个数的平方一定是正数.所以,a+1/2=0,a=-1/2.2b-4=0,b=2.所以,-ab方=1

因为|a+1/2|+(2b-4)²=0,
所以a+1/2=0 2b-4=0
a=-1/2 b=2
所以-ab²=2