Find All Real Zeros of the Polynomial $f ( x ) = x ^ { 4 } - 113 x ^ { 2 } + 3136$

Multiple Choice

Find all real zeros of the polynomial $f ( x ) = x ^ { 4 } - 113 x ^ { 2 } + 3136$ and determine the multiplicity of each.

A) x = 49, multiplicity 2; x = 64, multiplicity 2
B) x = 7, multiplicity 2; x = 8, multiplicity 2
C) x = 49, multiplicity 2; x = 8, multiplicity 1
D) x = -7, multiplicity 2; x = -8, multiplicity 2
E) x = 7, multiplicity 1; x = -7, multiplicity 1; x = 8, multiplicity 1; x = -8, multiplicity 1