2. Find the greatest common factor for the following list of terms.
20x6, 70x7
3. Factor by grouping.
x6 – 7x4 + 11x2 –77
6. Factor completely 4u2 – v2.
8. Factor completely.
64s3 – t3
10. Factor completely.
x2 –7x –60
11. Factor completely.
28y2 + 11y – 30
12. Factor completely.
7x2 + 7x – 14