Factor F(x) into Linear Factors Given That K Is a Zero

Multiple Choice

Factor f(x) into linear factors given that k is a zero of f(x) .
- $f ( x ) = x ^ { 4 } + 14 x ^ { 3 } + 44 x ^ { 2 } - 70 x - 245 ; k = - 7$ (multiplicity 2)

A) $f ( x ) = ( x - 7 ) ( x + 7 ) ( x - \sqrt { 5 } ) ( x + \sqrt { 5 } )$
B) $f ( x ) = ( x + 7 ) ^ { 2 } ( x - 5 ) ( x + 5 )$
C) $f ( x ) = ( x + 7 ) ^ { 2 } ( x - \sqrt { 5 } ) ( x + \sqrt { 5 } )$
D) $f ( x ) = ( x - 7 ) ^ { 2 } ( x - \sqrt { 5 } ) ( x + \sqrt { 5 } )$