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(2x+3y+4z)^(2)=...

`(2x+3y+4z)^(2)`=

A

`4x^2- 9x^2 + 16z ^212xy + 24yz + 16xz`

B

`2x^2 +34y^2+ 4z^2+ + 6xy + 12yz + 8xz`

C

`4x^2+ 9y^2+ 16z^2`

D

`4x^2+ 9y^2+ 16z^2 + xy + yz + zx`

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