a^2-2ab+b^2-4a+4b+4=0
(a²-2ab+b²)-(4a-4b)+4=0
(a-b)²-4(a-b)+4=0
((a-b)-2)²=0
a-b=2----(1)
因为2(a+b)=20,a+b=10---(2)
(1)+(2)得
2a=12,a=6,代回去求得b=4
边长是6和4
a^2-2ab+b^2-4a+4b+4=0
(a²-2ab+b²)-(4a-4b)+4=0
(a-b)²-4(a-b)+4=0
((a-b)-2)²=0
a-b=2----(1)
因为2(a+b)=20,a+b=10---(2)
(1)+(2)得
2a=12,a=6,代回去求得b=4
边长是6和4