(1)计算: (-2 ) 2 ×5+|π-1|- 9 .(2)化简: 4 a 2 -4 + 2 a
(1)计算:(-2)2×5+|π-1|-9.(2)化简:4a2-4+2a+2-1a-2....
(1)计算: (-2 ) 2 ×5+|π-1|- 9 .(2)化简: 4 a 2 -4 + 2 a+2 - 1 a-2 .
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