Question

無名💫✨

求教學 謝謝><

Answer 1

Choosen As Best Answer

C

乘法公式（a-b)^2=a^2-2ab+b^2
1003^2-1003*6+3^2
=1003^2-1003*2*3+3^2
=(1003-3)^2=1000^2=1000000#