Factor the Polynomial by Substitution $30 z ^ { 6 } - 26 z ^ { 4 } - 40 z ^ { 2 }$

Factor the polynomial by substitution.
- $30 z ^ { 6 } - 26 z ^ { 4 } - 40 z ^ { 2 }$

A) $2 z ^ { 2 } \left( 5 z ^ { 2 } - 4 \right) \left( 3 z ^ { 2 } + 5 \right)$
B) $\left( 6 z ^ { 3 } - 10 \right) \left( 5 z ^ { 3 } + 4 \right)$
C) $2 z ^ { 2 } \left( 3 z ^ { 2 } - 5 \right) \left( 5 z ^ { 2 } + 4 \right)$
D) $2 \left( 3 z ^ { 4 } - 5 \right) \left( 5 z ^ { 2 } + 4 \right)$

Correct Answer:

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