You can
put this solution on YOUR website!13x²yz + 169xy²z² - 39xyz²
GCF of 13, 169, and 39.....is 13
GCF of x², x, and x........is x {when choosing GCF of same variables, choose smallest exponent}
GCF of y, y² and y........is y
GCF of z, z², and z³......is z
GCF is 13xyz
= 13xyz(x + 13yz - 3z²) {factored out the GCF by dividing each term by it}
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