(x2-y2)-4(2x2-3y)
来源：学生学帮网 编辑：学帮网 时间：2024/06/17 21:48:33
(x2-y2)-4(2x2-3y)
=x²-y²-8x²+12y
=-7x²-y²+12y
(x²-y²)-4(2x²-3y)=x²-y²-8x²+12y=-7x²-y²+12y
(x2-y2)-4(2x2-3y)
=x²-y²-8x²+12y
=-7x²-y²+12y
(x²-y²)-4(2x²-3y)=x²-y²-8x²+12y=-7x²-y²+12y