[tex]12a^4x^2 y^{10} + 6 a^{9} x^{5} y^{4} - 4 a^{3} x^{5} y^{1} [/tex]
Start by looking for the GCF for the coefficients: 12, 6 and -4
largest factor/number that divides out of all of them.
GCF for coefficients is 2
Then take the smallest exponent common to all terms for each variable.
smallest exponent for "a" is 3
smallest exponent for "x" is 2
smallest exponent for "y" is 1
GCF is: 2a³x²y
Answer A.
