# How do you find the GCF of 36a^3b, 56ab?

Jan 15, 2017

GCF of $36 {a}^{3} b$ and $56 a b = 4 a b$
36a^3b = 2×2×3×3×a×a×a×b
56ab = 2×2×2×7×a×b
If we observe the factors of both, we will find that both have $2 , 2 , a \mathmr{and} b$ as common factors in both.
Therefore, GCF of $36 {a}^{3} b$ and 56ab = 2×2×a×b = 4ab.