∵ ac + bc = 17
∴ c * (a + b)=17
∴ a + b =17/c, a 和 b 是整数,c 只能=1
同理 ab + bc = 65
b * (a + c) = 65
∴ a + c = 65/b, b只能取5或13
最后得: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 是整数,c 只能=1
同理 ab + bc = 65
b * (a + c) = 65
∴ a + c = 65/b, b只能取5或13
最后得:a=4, b=13, c=1 或 a=12, b=5, c=1
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数要再大,你的b就出不来了,解个一元2次方程
-89to10-
♂
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01/25/2023 postreply
21:10:02
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这说小学题目,一元二次方程超纲了
-ephd-
♂
(0 bytes)
()
01/26/2023 postreply
07:03:02
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