Question

Find the GCF of the following terms.
16xy^3 , 20x^2y^2 , -4x^2y

Answer 1

$16xy^3=4xy\cdot4y^2\\\\20x^2y^2=4xy\cdot5xy\\\\-4x^2y=4xy\cdot(-x)\\\\GCF(16xy^3;\ 20x^2y^2;\ -4x^2y)=4xy$