Simplify the radical expression. Assume all variables represent positive real numbers.
-$- 8 \sqrt { 7 } - 6 \sqrt { 63 }$
A) $- 26 \sqrt { 7 }$
B) $- 14 \sqrt { 7 }$
C) $26 \sqrt { 7 }$
D) $- 10 \sqrt { 7 }$

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The Answer of Simplify the radical expression. Assume all variables represent positive real numbers.
-$- 8 \sqrt { 7 } - 6 \sqrt { 63 }$
A) $- 26 \sqrt { 7 }$
B) $- 14 \sqrt { 7 }$
C) $26 \sqrt { 7 }$
D) $- 10 \sqrt { 7 }$

Simplify the Radical Expression −87−663- 8 \sqrt { 7 } - 6 \sqrt { 63 }−87​−663​

Simplify the Radical Expression $- 8 \sqrt { 7 } - 6 \sqrt { 63 }$