How would you rewrite the expression 18x^3y^4 + 12x^5y^2 by factoring out the GCF?
6x^5y^4 (3y^2 + 2x^2)
6x^3y^2 (3y^2 + 2x^2)
6x^3y^2 (3xy^2 + 2x^2y)
3x^3y^2 (6y^2 + 4x^2)
6x^5y^4 (3y^2 + 2x^2)
6x^3y^2 (3y^2 + 2x^2)
6x^3y^2 (3xy^2 + 2x^2y)
3x^3y^2 (6y^2 + 4x^2)