英语翻译已知27²=a的六次方=9的b次方,求2a²+2ab.
问题描述：
英语翻译
已知27²=a的六次方=9的b次方,求2a²+2ab.
答
He says they are very good socks.
他说它们是非常好的袜子.
27² = a^6 = 9^b
于是a = ±3,b = 3
于是2a²+2ab = 2×9±2×3×3 = 36或0