The greatest common factor, or GCF, is the greatest factor
that divides two numbers. To find the GCF of two expression
<span>1.
</span>List the prime factors of each number.
<span>2.
</span>Multiply those factors both numbers
have in common. If there are no common prime factors, the GCF is 1.
16x^4y^3 = ( 4*4)(x*x*x*x)(y*y*y)
12x^2y^7 = (4*3)(x*x)(y*y*y*y*y*y*y)
<span>So common to them is 4x^2y^3 </span>