计算题:(2x+y)(3x+2y)-(x-y)^2
问题描述:
计算题:(2x+y)(3x+2y)-(x-y)^2
答
6x^+4xy+3xy+2y^-(x^+y^-2xy)=6x^+7xy+2y^-x^-y^+2xy=5x^+9xy+y^
计算题:(2x+y)(3x+2y)-(x-y)^2
6x^+4xy+3xy+2y^-(x^+y^-2xy)=6x^+7xy+2y^-x^-y^+2xy=5x^+9xy+y^