Find the Derivative of the Function $u ( x ) = \cos \left( x ^ { 2 } - 2 x \right)$

Find the derivative of the function. $u ( x ) = \cos \left( x ^ { 2 } - 2 x \right)$

A) $u ^ { \prime } ( x ) = ( 2 x - 2 ) \cos \left( x ^ { 2 } - 2 x \right)$
B) $u ^ { \prime } ( x ) = - ( 2 x + 2 ) \sin \left( x ^ { 2 } - 2 x \right)$
C) $u ^ { \prime } ( x ) = - ( 2 x - 2 ) \cos \left( x ^ { 2 } - 2 x \right)$
D) $u ^ { \prime } ( x ) = - ( 2 x - 2 ) \sin \left( x ^ { 2 } - 2 x \right)$
E) $u ^ { \prime } ( x ) = ( 2 x + 2 ) \sin \left( x ^ { 2 } - 2 x \right)$

Correct Answer:

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