Add or subtract as indicated.
-$3 \sqrt { 10 }$+9-$9 \sqrt { 10 }$
A)$3 \sqrt {10 }$
B)9 +$6\sqrt { 10 }$
C)9 + $12 \sqrt { 10 }$
D)9 - $9 \sqrt { 10 }$

Question

Quizplus · Accepted Answer

- Start with 3 10
- Add 9 to get 12 10
- Subtract 9 10 to get 3 - 9 10 or 9 - 6 10 First, add 3 10 and 9 to get 12 10. Then, subtract 9 10 to get 3 - 6 10, which can be simplified to 3 - 6 10. Therefore, the answer is D.

Add or Subtract as Indicated 3103 \sqrt { 10 }310​ +9- 9109 \sqrt { 10 }910​

Add or Subtract as Indicated $3 \sqrt { 10 }$ +9- $9 \sqrt { 10 }$