∵ ac + bc = 17
∴ c * (a + b)=17
∴ a + b =17/c, a 和 b 是整數,c 隻能=1
同理 ab + bc = 65
b * (a + c) = 65
∴ a + c = 65/b, b隻能取5或13
最後得:a=4, b=13, c=1 或 a=12, b=5, c=1
∵ ac + bc = 17
∴ c * (a + b)=17
∴ a + b =17/c, a 和 b 是整數,c 隻能=1
同理 ab + bc = 65
b * (a + c) = 65
∴ a + c = 65/b, b隻能取5或13
最後得:a=4, b=13, c=1 或 a=12, b=5, c=1
• 數要再大,你的b就出不來了,解個一元2次方程 -89to10- ♂ (0 bytes) () 01/25/2023 postreply 21:10:02
• 這說小學題目,一元二次方程超綱了 -ephd- ♂ (0 bytes) () 01/26/2023 postreply 07:03:02
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