Remember that only roots with same roots you can combine.
Split 12 into 2 numbers that either one will be 3 so that you can combine the roots.
12 is the same as 4 × 3.
Root of 4 is 2 so you can take it out of the root as 2.
So the answer will be => -12(2)√3-2√3 = -22√3
Hope this helps!
Answer:
Yes, the sequence is an arithmetic sequence
Step-by-step explanation:
Notice that each consecutive number is being added by the next odd number up:
0+3=3
3+5=8
8+7=15
15+9=24
24+11=35
We can represent this as the arithmetic sequence 
Slope(m) = -2 hope this helps