Greatest Common Factor .... largest expression which (evenly) divides into the given expressions.
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It is 8 that is the gcf of 16 and 40
36
use division by primes to find the gcf
To factorise the expression (25x + 15y), first identify the greatest common factor (GCF) of the coefficients 25 and 15, which is 5. Then, factor out the GCF from the expression: [ 25x + 15y = 5(5x + 3y) ] So, the factored form is (5(5x + 3y)).
The first example that comes to mind is that since 12xy is a factor of 36xy, you could use 12xy. This would have the GCF that you want. ■