Chọn câu sai: (2x+3y)^2 = 4x^2 + 12xy + 9xy^2

A. ${\left(2x + 3y\right)}^2 = 4x^2 + 12xy + 9y^2$

B.${\left(x - (1/2)\right)}^2 = x^2 – x + 1/4$

C. $x^2 – 3y^2 = (x + 3y)(x – 3y)$

D. $1 – 9x^2 = (1 – 3x)(1 + 3x)$