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Simplify the Expression $- 8 \sqrt { 5 } + 19 \sqrt { 5 }$

Question 513

Multiple Choice

Simplify the expression. Assume all variables represent positive real numbers.
- $- 8 \sqrt { 5 } + 19 \sqrt { 5 }$

A) $- 12 \sqrt { 5 }$
B) $11 \sqrt { 5 }$
C) $28 \sqrt { 5 }$
D) $- 27 \sqrt { 5 }$

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