1.

Which one of the following expressions is equal to \[\mathbf{64}{{\mathbf{x}}^{\mathbf{2}}}\mathbf{+9}{{\mathbf{y}}^{\mathbf{2}}}\mathbf{-48xy}\]?

A. \[{{\left( 8x+3y \right)}^{2}}\]
B. \[{{\left( 5x-y \right)}^{2}}\]
C. \[{{\left( 8x-3y \right)}^{2}}\]
D. \[{{\left( 5x-2y \right)}^{2}}\]
E. None of these
Answer» D. \[{{\left( 5x-2y \right)}^{2}}\]


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