(x-2)(x-6)怎么算?(x+2)(x+6)怎么算
问题描述:
(x-2)(x-6)怎么算?(x+2)(x+6)怎么算
答
(X-2)(X-6)=X(2)-8X+12
(X+2)(X+6)=X(2)+8X+12