# How do you find the GCF of 21x^2y, 63xy^2?

Jan 6, 2017

21xy

#### Explanation:

factorize 21, we get = $3 \times 7$

factorize 63, we get = $3 \times 3 \times 7$

highest common factor between ${x}^{2} , x = x$

highest common factor between $y , {y}^{2} = y$

GCF = $3 \times 7 \times x \times y$