( )-(x2+3xy)=-xy-1/3y2括号里添几
问题描述:
( )-(x2+3xy)=-xy-1/3y2括号里添几
答
(x2+2xy-1/3y2 )-(x2+3xy)=-xy-1/3y2
答
(x+y)²-y²-1/2y²
( )-(x2+3xy)=-xy-1/3y2括号里添几
(x2+2xy-1/3y2 )-(x2+3xy)=-xy-1/3y2
(x+y)²-y²-1/2y²