Add or subtract.
-$- 3 \sqrt { 32 } - 4 \sqrt { 8 }$
A) $- 4 \sqrt { 2 }$
B) $- 20 \sqrt { 2 }$
C) $4 \sqrt { 2 }$
D) $20 \sqrt { 2 }$

Question

Quizplus · Accepted Answer

First, simplify the square roots: $\sqrt{32} = \sqrt{16 \cdot 2} = 4\sqrt{2}$ and $\sqrt{8} = \sqrt{4 \cdot 2} = 2\sqrt{2}$. Then, substitute these into the original expression: $-3(4\sqrt{2}) - 4(2\sqrt{2}) = -12\sqrt{2} - 8\sqrt{2} = -20\sqrt{2}$.

Add or Subtract −332−48- 3 \sqrt { 32 } - 4 \sqrt { 8 }−332​−48​

Add or Subtract $- 3 \sqrt { 32 } - 4 \sqrt { 8 }$