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Add the Polynomials $5 z ^ { 3 } + 9 z + 10 \text { and } - 5 z ^ { 3 } - 7 z + 11$

Question 236

Multiple Choice

Add the polynomials. $5 z ^ { 3 } + 9 z + 10 \text { and } - 5 z ^ { 3 } - 7 z + 11$

A) $10 z ^ { 3 } + 2 z + 21$
B) $2 z + 21$
C) $2 z - 21$
D) $14 z + 21$
E) $z ^ { 3 } + 2 z + 21$

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