Which of the following is correct?

A

$$(3x-2y)^{2} = 9x^{2}-12xy + 4y^{2}$$

B

$$(3x-2y)^{2} = 9x^{2}-6xy + 4y^{2}$$

C

$$(3x + 2y)^{2} = 9x^{2}-12xy + 4y^{2}$$

D

$$(3x + 2y)^{2} = 9x^{2}-6xy + 4y^{2}$$