(n+2)(n+3)=506 求n
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(n+2)(n+3)=506 求n
(n+2)(n+3)=506 求n
(n+2)(n+3)=506 求n
20
(n+2)(n+3)=n×n+5n+6=506
n×n+5n-500=0
解得n=20 或n=-25
希望采纳谢谢- -#
n=20 n=-25
(n+2)(n+3)=506 求n
(n+2)(n+3)=506 求n
(n+2)(n+3)=506 求n
20
(n+2)(n+3)=n×n+5n+6=506
n×n+5n-500=0
解得n=20 或n=-25
希望采纳谢谢- -#
n=20 n=-25