-5ab + 7ab -9ab + ab -2ab ... Let's simplify that a bit:ab(-5+7-9+1-2) = -8ab
55/5ab + 4/5ab = 59/5ab
12ab+3ab=15ab
gcd of 5ab,28xy
2x5x8
-5ab + 7ab -9ab + ab -2ab ... Let's simplify that a bit:ab(-5+7-9+1-2) = -8ab
8ab
55/5ab + 4/5ab = 59/5ab
12ab+3ab=15ab
7ab-5ab = 2
gcd of 5ab,28xy
6a to the second power minus 8ab + 2a
2x5x8
(5ab^2 + 4cd)(5ab^2 4cd) <
6a squared-8ab+2a factor completely and check mentally
8ab
The GCF of 5ab and 56b squared is b.