question_answer

Add the following: \[\mathbf{2x}\text{ }+\text{ }\mathbf{3}{{\mathbf{y}}^{\mathbf{2}}}\mathbf{z}\text{ }+\text{ }\mathbf{5}\] and \[\mathbf{7}\text{ }-\text{ }\mathbf{3yz}\text{ }+\text{ }\mathbf{3x}\]

A) \[5x+12+3yz+3{{y}^{2}}z\]

B) \[5x+12-3yz+3{{y}^{2}}z\]

C)  \[7x+10-3yz+5{{y}^{2}}z\]

D)  \[5x-12+3yz-3{{y}^{\text{2}}}\text{z}\]

E)  None of these