(x-1)² 化简怎么化,
问题描述:
(x-1)² 化简怎么化,
答
(x-1)²
=(x-1)(x-1)
= X²-x-x+1
=x²-2x+1
(x-1)² 化简怎么化,
(x-1)²
=(x-1)(x-1)
= X²-x-x+1
=x²-2x+1