a^2/c=25/4,a^2=25c/4
bc=12,b=12/c
a^2-c^2=b^2,25c/4-c^2=144/c^2
25c^3-4c^4-576=0
4c^4-25c^3+576=0
4c^4-16c^3-9c^3+36c^2-36c^2+144c-144c+576=0
(c-4)*(4c^3-9c^2-36c-144)=0
所以方程有一解是:c=4,b=3,a=±5,是唯一整数解
a^2/c=25/4,a^2=25c/4
bc=12,b=12/c
a^2-c^2=b^2,25c/4-c^2=144/c^2
25c^3-4c^4-576=0
4c^4-25c^3+576=0
4c^4-16c^3-9c^3+36c^2-36c^2+144c-144c+576=0
(c-4)*(4c^3-9c^2-36c-144)=0
所以方程有一解是:c=4,b=3,a=±5,是唯一整数解