The coefficient of x2 in (2x + y)3 is:

8 12y2 12y 12

12y

(a + b)3 = a3 + b3 + 3ab(a+b) (2x + y)3 = (2x)3 + y3 + 3 × 2x × y (2x + y) = 8x3 + y3 + 12x2y + 6xy2 = Coefficient of x2 = 12y