Answer:
I believe it is (Square root) And then make it positive. Therefore, 634 should be the correct answer.
Step-by-step explanation:
The simplified answer is 17. Should I show you the steps?
Answer:
See below
Step-by-step explanation:
1. 12
2. 15 [3*12-21 = 15]
3. 24 [3*15-21 = 24]
4. 51 [3*24 - 21 = 51]