已知3(2a-b)²+9-a²的绝对值/根号a+3=0,求a+b=( )
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![已知3(2a-b)²+9-a²的绝对值/根号a+3=0,求a+b=( )](/uploads/image/z/589051-19-1.jpg?t=%E5%B7%B2%E7%9F%A53%282a-b%29%26%23178%3B%EF%BC%8B9-a%26%23178%3B%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%2F%E6%A0%B9%E5%8F%B7a%2B3%EF%BC%9D0%2C%E6%B1%82a%2Bb%3D%28+%29)
已知3(2a-b)²+9-a²的绝对值/根号a+3=0,求a+b=( )
已知3(2a-b)²+9-a²的绝对值/根号a+3=0,求a+b=( )
已知3(2a-b)²+9-a²的绝对值/根号a+3=0,求a+b=( )
3(2a-b)²+9-a²的绝对值/根号a+3=0
2a-b=0
9-a平方=0,但a+3≠0
所以
a=3,b=6
a+b=3+6=9
b等于正负6