Simplify.
-$6 \sqrt { 7 } + 9 \sqrt { 7 } - 12$
A) $- 3 \sqrt { 7 } - 12$
B) $27 \sqrt { 7 }$
C) $3 \sqrt { 7 }$
D) $15 \sqrt { 7 } - 12$

Question

Quizplus · Accepted Answer

When simplifying expressions with square roots, you can combine like terms. Here, $6 \sqrt{7}$ and $9 \sqrt{7}$ are like terms, so you add them together to get $15 \sqrt{7}$. The $-12$ remains unchanged because it does not have a like term to combine with. Therefore, the simplified expression is $15 \sqrt{7} - 12$.

Simplify - 67+97−126 \sqrt { 7 } + 9 \sqrt { 7 } - 1267​+97​−12

Simplify
- $6 \sqrt { 7 } + 9 \sqrt { 7 } - 12$