Answer:
( − 3 ) ( 2 + 7 )
Step-by-step explanation:
2 2 + − 2 1
Grouping
1
Use the sum-product pattern
2 2 + − 2 2 2 + 7 − 6 − 2 1
Common factor from the two pairs
2 2 + 7 − 6 − 21 ( 2 +7 ) − 3 ( 2 + 7 )
