Perform Operations with Polynomials in Several Variables
- $$( 6 x y + 7 ) ( 7 x y + 3 )$$

Perform Operations with Polynomials in Several Variables
- $$( 6 x y + 7 ) ( 7 x y + 3 )$$

A) $42 x ^ { 2 } y ^ { 2 } + 67 x y + 21$
B) $13 x ^ { 2 } y ^ { 2 } + 67 x y + 21$
C) $42 x ^ { 2 } y ^ { 2 } + 67 x y + 67$
D) $13 x ^ { 2 } y ^ { 2 } + 67 x y + 67$