1.

Multiply \[6{{x}^{3}}-y+3{{x}^{2}}y\,\,by\,\,{{x}^{2}}+{{y}^{2}}\]

A.  \[6{{x}^{5}}-3{{x}^{4}}y-6{{x}^{3}}{{y}^{2}}-6{{x}^{3}}{{y}^{2}}+2{{x}^{2}}{{y}^{3}}-{{y}^{4}}\]
B.  \[6{{x}^{5}}+3{{x}^{4}}y+6{{x}^{3}}{{y}^{2}}-{{x}^{2}}y+3{{x}^{2}}{{y}^{3}}-{{y}^{3}}\]
C.  \[6{{x}^{5}}-3{{x}^{4}}y+6{{x}^{3}}{{y}^{2}}+2{{x}^{2}}{{y}^{3}}-{{y}^{5}}\]
D.  \[6{{x}^{5}}+3{{x}^{4}}y-6{{x}^{3}}{{y}^{2}}+2{{x}^{2}}{{y}^{3}}-{{y}^{5}}\]
Answer» C.  \[6{{x}^{5}}-3{{x}^{4}}y+6{{x}^{3}}{{y}^{2}}+2{{x}^{2}}{{y}^{3}}-{{y}^{5}}\]


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