【急】解同余方程:x^3+5x^2+9≡0(mod 9)

求详细过程~
2025-05-01 10:08:06
推荐回答(1个)
回答1:

x^3+5x^2=9k
x^2(x+5)=9k
(1) x=3
(2) x=4