过程结果
=[3(x+2)+2y]^2
=9(x+2)^2+12(x+2)y+4y^2
=9x^2+36x+36+12xy+24y+4y^2
(3x+6+2y)²
过程结果
=[3(x+2)+2y]^2
=9(x+2)^2+12(x+2)y+4y^2
=9x^2+36x+36+12xy+24y+4y^2
过程结果
=[3(x+2)+2y]^2
=9(x+2)^2+12(x+2)y+4y^2
=9x^2+36x+36+12xy+24y+4y^2
过程结果
=[3(x+2)+2y]^2
=9(x+2)^2+12(x+2)y+4y^2
=9x^2+36x+36+12xy+24y+4y^2