(﹣a²+5+4a)+(5a-4+2a²),其中a=2
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![(﹣a²+5+4a)+(5a-4+2a²),其中a=2](/uploads/image/z/1789814-38-4.jpg?t=%EF%BC%88%EF%B9%A3a%26%23178%3B%EF%BC%8B5%EF%BC%8B4a%EF%BC%89%EF%BC%8B%EF%BC%885a%EF%BC%8D4%EF%BC%8B2a%26%23178%3B%EF%BC%89%2C%E5%85%B6%E4%B8%ADa%EF%BC%9D2)
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(﹣a²+5+4a)+(5a-4+2a²),其中a=2
(﹣a²+5+4a)+(5a-4+2a²),其中a=2
(﹣a²+5+4a)+(5a-4+2a²),其中a=2
(﹣a²+5+4a)+(5a-4+2a²),其中a=2
(﹣a²+5+4a)+(5a-4+2a²)
=(-4+5+8)+(10-4+8)
=9+14
=23